diff --git a/lib/editor/atto/plugins/html/thirdpartylibs.xml b/lib/editor/atto/plugins/html/thirdpartylibs.xml
index 1ef4c0ec0aa..6baba0ca1fb 100644
--- a/lib/editor/atto/plugins/html/thirdpartylibs.xml
+++ b/lib/editor/atto/plugins/html/thirdpartylibs.xml
@@ -4,7 +4,7 @@
     <location>yui/src/codemirror</location>
     <name>codemirror</name>
     <description>CodeMirror is a versatile text editor implemented in JavaScript for the browser.</description>
-    <version>5.65.12</version>
+    <version>5.65.15</version>
     <license>MIT</license>
     <repository>https://github.com/codemirror/codemirror5</repository>
   </library>
diff --git a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-debug.js b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-debug.js
index 03dd921dd45..91732ef20b3 100644
--- a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-debug.js
+++ b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-debug.js
@@ -9871,7 +9871,7 @@ var define = null; // Remove require.js support in this context.
 
   addLegacyProps(CodeMirror);
 
-  CodeMirror.version = "5.65.12";
+  CodeMirror.version = "5.65.15";
 
   return CodeMirror;
 
diff --git a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-min.js b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-min.js
index 5b29b57af79..7e408686ea6 100644
--- a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-min.js
+++ b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror-min.js
@@ -26,7 +26,7 @@ left:n.display.lineDiv.offsetWidth+100,top:t},"div");return{from:e.from(),to:t}}
 t.prototype.forceCompositionEnd=function(){this.composing&&(clearTimeout(this.readDOMTimeout),this.composing=null,this.updateFromDOM(),this.div.blur(),this.div.focus())},t.prototype.readFromDOMSoon=function(){var e=this;null==this.readDOMTimeout&&(this.readDOMTimeout=setTimeout(function(){if(e.readDOMTimeout=null,e.composing){if(!e.composing.done)return;e.composing=null}e.updateFromDOM()},80))},t.prototype.updateFromDOM=function(){var e=this;!this.cm.isReadOnly()&&this.pollContent()||bi(this.cm,function(){return jr(e.cm)})},t.prototype.setUneditable=function(e){e.contentEditable="false"},t.prototype.onKeyPress=function(e){0==e.charCode||this.composing||(e.preventDefault(),this.cm.isReadOnly()||wi(this.cm,kl)(this.cm,String.fromCharCode(null==e.charCode?e.keyCode:e.charCode),0))},t.prototype.readOnlyChanged=function(e){this.div.contentEditable=String("nocursor"!=e)},t.prototype.onContextMenu=function(){},t.prototype.resetPosition=function(){},t.prototype.needsContentAttribute=!0,(Re=function(e){this.cm=e,this.prevInput="",this.pollingFast=!1,this.polling=new p,this.hasSelection=!1,this.composing=null,this.resetting=!1}).prototype.init=function(n){var r,e=this,i=this,o=this.cm;function t(e){if(!Pt(o,e)){if(o.somethingSelected())xl({lineWise:!1,text:o.getSelections()});else{if(!o.options.lineWiseCopyCut)return;var t=Tl(o);xl({lineWise:!0,text:t.text}),"cut"==e.type?o.setSelections(t.ranges,null,v):(i.prevInput="",r.value=t.text.join("\n"),c(r))}"cut"==e.type&&(o.state.cutIncoming=+new Date)}}this.createField(n),r=this.textarea,n.wrapper.insertBefore(this.wrapper,n.wrapper.firstChild),Ze&&(r.style.width="0px"),w(r,"input",function(){x&&9<=Ke&&e.hasSelection&&(e.hasSelection=null),i.poll()}),w(r,"paste",function(e){Pt(o,e)||Cl(e,o)||(o.state.pasteIncoming=+new Date,i.fastPoll())}),w(r,"cut",t),w(r,"copy",t),w(n.scroller,"paste",function(e){if(!nr(n,e)&&!Pt(o,e)){if(!r.dispatchEvent)return o.state.pasteIncoming=+new Date,void i.focus();var t=new Event("paste");t.clipboardData=e.clipboardData,r.dispatchEvent(t)}}),w(n.lineSpace,"selectstart",function(e){nr(n,e)||Ft(e)}),w(r,"compositionstart",function(){var e=o.getCursor("from");i.composing&&i.composing.range.clear(),i.composing={start:e,range:o.markText(e,o.getCursor("to"),{className:"CodeMirror-composing"})}}),w(r,"compositionend",function(){i.composing&&(i.poll(),i.composing.range.clear(),i.composing=null)})},Re.prototype.createField=function(e){this.wrapper=Ml(),this.textarea=this.wrapper.firstChild;var t=this.cm.options;Ll(this.textarea,t.spellcheck,t.autocorrect,t.autocapitalize)},Re.prototype.screenReaderLabelChanged=function(e){e?this.textarea.setAttribute("aria-label",e):this.textarea.removeAttribute("aria-label")},Re.prototype.prepareSelection=function(){var e,t=this.cm,n=t.display,r=t.doc,i=_r(t);return t.options.moveInputWithCursor&&(t=Sr(t,r.sel.primary().head,"div"),r=n.wrapper.getBoundingClientRect(),e=n.lineDiv.getBoundingClientRect(),i.teTop=Math.max(0,Math.min(n.wrapper.clientHeight-10,t.top+e.top-r.top)),i.teLeft=Math.max(0,Math.min(n.wrapper.clientWidth-10,t.left+e.left-r.left))),i},Re.prototype.showSelection=function(e){var t=this.cm.display;it(t.cursorDiv,e.cursors),it(t.selectionDiv,e.selection),null!=e.teTop&&(this.wrapper.style.top=e.teTop+"px",this.wrapper.style.left=e.teLeft+"px")},Re.prototype.reset=function(e){var t,n;this.contextMenuPending||this.composing&&e||(t=this.cm,this.resetting=!0,t.somethingSelected()?(this.prevInput="",n=t.getSelection(),this.textarea.value=n,t.state.focused&&c(this.textarea),x&&9<=Ke&&(this.hasSelection=n)):e||(this.prevInput=this.textarea.value="",x&&9<=Ke&&(this.hasSelection=null)),this.resetting=!1)},Re.prototype.getField=function(){return this.textarea},Re.prototype.supportsTouch=function(){return!1},Re.prototype.focus=function(){if("nocursor"!=this.cm.options.readOnly&&(!Je||at(this.textarea.ownerDocument)!=this.textarea))try{this.textarea.focus()}catch(e){}},Re.prototype.blur=function(){this.textarea.blur()},Re.prototype.resetPosition=function(){this.wrapper.style.top=this.wrapper.style.left=0},Re.prototype.receivedFocus=function(){this.slowPoll()},Re.prototype.slowPoll=function(){var e=this;this.pollingFast||this.polling.set(this.cm.options.pollInterval,function(){e.poll(),e.cm.state.focused&&e.slowPoll()})},Re.prototype.fastPoll=function(){var e=!1,t=this;t.pollingFast=!0,t.polling.set(20,function n(){t.poll()||e?(t.pollingFast=!1,t.slowPoll()):(e=!0,t.polling.set(60,n))})},Re.prototype.poll=function(){var e,t,n,r,i=this,o=this.cm,l=this.textarea,a=this.prevInput;if(this.contextMenuPending||this.resetting||!o.state.focused||D(l)&&!a&&!this.composing||o.isReadOnly()||o.options.disableInput||o.state.keySeq)return!1;if((e=l.value)==a&&!o.somethingSelected())return!1;if(x&&9<=Ke&&this.hasSelection===e||et&&/[\uf700-\uf7ff]/.test(e))return o.display.input.reset(),!1;if(o.doc.sel==o.display.selForContextMenu&&(8203!=(t=e.charCodeAt(0))||a||(a="​"),8666==t))return this.reset(),this.cm.execCommand("undo");for(n=0,r=Math.min(a.length,e.length);n<r&&a.charCodeAt(n)==e.charCodeAt(n);)++n;return bi(o,function(){kl(o,e.slice(n),a.length-n,null,i.composing?"*compose":null),1e3<e.length||-1<e.indexOf("\n")?l.value=i.prevInput="":i.prevInput=e,i.composing&&(i.composing.range.clear(),i.composing.range=o.markText(i.composing.start,o.getCursor("to"),{className:"CodeMirror-composing"}))}),!0},Re.prototype.ensurePolled=function(){this.pollingFast&&this.poll()&&(this.pollingFast=!1)},Re.prototype.onKeyPress=function(){x&&9<=Ke&&(this.hasSelection=null),this.fastPoll()},Re.prototype.onContextMenu=function(e){var n,r,u,t,d,i,o=this,l=o.cm,a=l.display,s=o.textarea;function h(){var e,t;null!=s.selectionStart&&(t="​"+((e=l.somethingSelected())?s.value:""),s.value="⇚",s.value=t,o.prevInput=e?"":"​",s.selectionStart=1,s.selectionEnd=t.length,a.selForContextMenu=l.doc.sel)}function c(){var e,t;o.contextMenuPending==c&&(o.contextMenuPending=!1,o.wrapper.style.cssText=u,s.style.cssText=r,
 x&&Ke<9&&a.scrollbars.setScrollTop(a.scroller.scrollTop=n),null!=s.selectionStart&&((!x||Ke<9)&&h(),e=0,t=function(){a.selForContextMenu==l.doc.sel&&0==s.selectionStart&&0<s.selectionEnd&&"​"==o.prevInput?wi(l,Co)(l):e++<10?a.detectingSelectAll=setTimeout(t,500):(a.selForContextMenu=null,a.input.reset())},a.detectingSelectAll=setTimeout(t,200)))}o.contextMenuPending&&o.contextMenuPending(),t=Rr(l,e),n=a.scroller.scrollTop,t&&!_e&&(l.options.resetSelectionOnContextMenu&&-1==l.doc.sel.contains(t)&&wi(l,go)(l.doc,Bi(t),v),r=s.style.cssText,u=o.wrapper.style.cssText,t=o.wrapper.offsetParent.getBoundingClientRect(),o.wrapper.style.cssText="position: static",s.style.cssText="position: absolute; width: 30px; height: 30px;\n      top: "+(e.clientY-t.top-5)+"px; left: "+(e.clientX-t.left-5)+"px;\n      z-index: 1000; background: "+(x?"rgba(255, 255, 255, .05)":"transparent")+";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);",Ge&&(d=s.ownerDocument.defaultView.scrollY),a.input.focus(),Ge&&s.ownerDocument.defaultView.scrollTo(null,d),a.input.reset(),l.somethingSelected()||(s.value=o.prevInput=" "),o.contextMenuPending=c,a.selForContextMenu=l.doc.sel,clearTimeout(a.detectingSelectAll),x&&9<=Ke&&h(),f?(jt(e),i=function(){zt(window,"mouseup",i),setTimeout(c,20)},w(window,"mouseup",i)):setTimeout(c,50))},Re.prototype.readOnlyChanged=function(e){e||this.reset(),this.textarea.disabled="nocursor"==e,this.textarea.readOnly=!!e},Re.prototype.setUneditable=function(){},Re.prototype.needsContentAttribute=!1,Ee=(Pe=bl).optionHandlers,Pe.defineOption=n,Pe.Init=ke,n("value","",function(e,t){return e.setValue(t)},!0),n("mode",null,function(e,t){e.doc.modeOption=t,Ui(e)},!0),n("indentUnit",2,Ui,!0),n("indentWithTabs",!1),n("smartIndent",!0),n("tabSize",4,function(e){qi(e),yr(e),jr(e)},!0),n("lineSeparator",null,function(e,r){var i,o,t;if(e.doc.lineSep=r)for(i=[],o=e.doc.first,e.doc.iter(function(e){for(var t,n=0;-1!=(t=e.text.indexOf(r,n));)n=t+r.length,i.push(A(o,t));o++}),t=i.length-1;0<=t;t--)Oo(e.doc,r,i[t],A(i[t].line,i[t].ch+r.length))}),n("specialChars",/[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b\u200e\u200f\u2028\u2029\u202d\u202e\u2066\u2067\u2069\ufeff\ufff9-\ufffc]/g,function(e,t,n){e.state.specialChars=new RegExp(t.source+(t.test("\t")?"":"|\t"),"g"),n!=ke&&e.refresh()}),n("specialCharPlaceholder",jn,function(e){return e.refresh()},!0),n("electricChars",!0),n("inputStyle",Je?"contenteditable":"textarea",function(){throw new Error("inputStyle can not (yet) be changed in a running editor")},!0),n("spellcheck",!1,function(e,t){return e.getInputField().spellcheck=t},!0),n("autocorrect",!1,function(e,t){return e.getInputField().autocorrect=t},!0),n("autocapitalize",!1,function(e,t){return e.getInputField().autocapitalize=t},!0),n("rtlMoveVisually",!Ve),n("wholeLineUpdateBefore",!0),n("theme","default",function(e){ml(e),Pi(e)},!0),n("keyMap","default",function(e,t,n){t=Zo(t),n=n!=ke&&Zo(n);n&&n.detach&&n.detach(e,t),t.attach&&t.attach(e,n||null)}),n("extraKeys",null),n("configureMouse",null),n("lineWrapping",!1,vl,!0),n("gutters",[],function(e,t){e.display.gutterSpecs=zi(t,e.options.lineNumbers),Pi(e)},!0),n("fixedGutter",!0,function(e,t){e.display.gutters.style.left=t?Hr(e.display)+"px":"0",e.refresh()},!0),n("coverGutterNextToScrollbar",!1,function(e){return pi(e)},!0),n("scrollbarStyle","native",function(e){mi(e),pi(e),e.display.scrollbars.setScrollTop(e.doc.scrollTop),e.display.scrollbars.setScrollLeft(e.doc.scrollLeft)},!0),n("lineNumbers",!1,function(e,t){e.display.gutterSpecs=zi(e.options.gutters,t),Pi(e)},!0),n("firstLineNumber",1,Pi,!0),n("lineNumberFormatter",function(e){return e},Pi,!0),n("showCursorWhenSelecting",!1,qr,!0),n("resetSelectionOnContextMenu",!0),n("lineWiseCopyCut",!0),n("pasteLinesPerSelection",!0),n("selectionsMayTouch",!1),n("readOnly",!1,function(e,t){"nocursor"==t&&(ei(e),e.display.input.blur()),e.display.input.readOnlyChanged(t)}),n("screenReaderLabel",null,function(e,t){e.display.input.screenReaderLabelChanged(t=""===t?null:t)}),n("disableInput",!1,function(e,t){t||e.display.input.reset()},!0),n("dragDrop",!0,yl),n("allowDropFileTypes",null),n("cursorBlinkRate",530),n("cursorScrollMargin",0),n("cursorHeight",1,qr,!0),n("singleCursorHeightPerLine",!0,qr,!0),n("workTime",100),n("workDelay",100),n("flattenSpans",!0,qi,!0),n("addModeClass",!1,qi,!0),n("pollInterval",100),n("undoDepth",200,function(e,t){return e.doc.history.undoDepth=t}),n("historyEventDelay",1250),n("viewportMargin",10,function(e){return e.refresh()},!0),n("maxHighlightLength",1e4,qi,!0),n("moveInputWithCursor",!0,function(e,t){t||e.display.input.resetPosition()}),n("tabindex",null,function(e,t){return e.display.input.getField().tabIndex=t||""}),n("autofocus",null),n("direction","ltr",function(e,t){return e.doc.setDirection(t)},!0),n("phrases",null),Ie=(He=bl).optionHandlers,Fe=He.helpers={},He.prototype={constructor:He,focus:function(){dt(this).focus(),this.display.input.focus()},setOption:function(e,t){var n=this.options,r=n[e];n[e]==t&&"mode"!=e||(n[e]=t,Ie.hasOwnProperty(e)&&wi(this,Ie[e])(this,t,r),Wt(this,"optionChange",this,e))},getOption:function(e){return this.options[e]},getDoc:function(){return this.doc},addKeyMap:function(e,t){this.state.keyMaps[t?"push":"unshift"](Zo(e))},removeKeyMap:function(e){for(var t=this.state.keyMaps,n=0;n<t.length;++n)if(t[n]==e||t[n].name==e)return t.splice(n,1),!0},addOverlay:xi(function(e,t){var n=e.token?e:He.getMode(this.options,e);if(n.startState)throw new Error("Overlays may not be stateful.");for(var r=this.state.overlays,n={mode:n,modeSpec:e,opaque:t&&t.opaque,priority:t&&t.priority||0},i=function(e){return e.priority},o=0,l=i(n);o<r.length&&i(r[o])<=l;)o++;r.splice(o,0,n),this.state.modeGen++,jr(this)}),removeOverlay:xi(function(e){for(var t,n=this.state.overlays,r=0;r<n.length;++r)if((t=n[r].modeSpec)==e||"string"==typeof e&&t.name==e)return n.splice(r,1),this.state.modeGen++,void jr(this)}),
 indentLine:xi(function(e,t,n){"string"!=typeof t&&"number"!=typeof t&&(t=null==t?this.options.smartIndent?"smart":"prev":t?"add":"subtract"),tn(this.doc,e)&&wl(this,e,t,n)}),indentSelection:xi(function(e){for(var t,n,r,i,o=this.doc.sel.ranges,l=-1,a=0;a<o.length;a++)if((i=o[a]).empty())i.head.line>l&&(wl(this,i.head.line,e,!0),l=i.head.line,a==this.doc.sel.primIndex&&li(this));else{for(t=i.from(),i=i.to(),n=Math.max(l,t.line),l=Math.min(this.lastLine(),i.line-(i.ch?0:1))+1,r=n;r<l;++r)wl(this,r,e);i=this.doc.sel.ranges,0==t.ch&&o.length==i.length&&0<i[a].from().ch&&ho(this.doc,a,new ne(t,i[a].to()),v)}}),getTokenAt:function(e,t){return mn(this,e,t)},getLineTokens:function(e,t){return mn(this,A(e),t,!0)},getTokenTypeAt:function(e){var t,n,r,i,o,l;if(e=O(this.doc,e),r=((t=dn(this,N(this.doc,e.line))).length-1)/2,(n=0)==(i=e.ch))o=t[2];else for(;;)if(((l=n+r>>1)?t[2*l-1]:0)>=i)r=l;else{if(!(t[2*l+1]<i)){o=t[2*l+2];break}n=1+l}return(e=o?o.indexOf("overlay "):-1)<0?o:0==e?null:o.slice(0,e-1)},getModeAt:function(e){var t=this.doc.mode;return t.innerMode?He.innerMode(t,this.getTokenAt(e).state).mode:t},getHelper:function(e,t){return this.getHelpers(e,t)[0]},getHelpers:function(e,t){var n,r,i,o,l,a,s=[];if(!Fe.hasOwnProperty(t))return s;if(n=Fe[t],"string"==typeof(r=this.getModeAt(e))[t])n[r[t]]&&s.push(n[r[t]]);else if(r[t])for(i=0;i<r[t].length;i++)(o=n[r[t][i]])&&s.push(o);else r.helperType&&n[r.helperType]?s.push(n[r.helperType]):n[r.name]&&s.push(n[r.name]);for(l=0;l<n._global.length;l++)(a=n._global[l]).pred(r,this)&&-1==gt(s,a.val)&&s.push(a.val);return s},getStateAfter:function(e,t){var n=this.doc;return hn(this,(e=sn(n,null==e?n.first+n.size-1:e))+1,t).state},cursorCoords:function(e,t){var n=this.doc.sel.primary(),e=null==e?n.head:"object"==typeof e?O(this.doc,e):e?n.from():n.to();return Sr(this,e,t||"page")},charCoords:function(e,t){return Cr(this,O(this.doc,e),t||"page")},coordsChar:function(e,t){return Mr(this,(e=kr(this,e,t||"page")).left,e.top)},lineAtHeight:function(e,t){return e=kr(this,{top:e,left:0},t||"page").top,en(this.doc,e+this.display.viewOffset)},heightAtLine:function(e,t,n){var r=!1,i="number"==typeof e?(i=this.doc.first+this.doc.size-1,e<this.doc.first?e=this.doc.first:i<e&&(e=i,r=!0),N(this.doc,e)):e;return xr(this,i,{top:0,left:0},t||"page",n||r).top+(r?this.doc.height-Hn(i):0)},defaultTextHeight:function(){return Wr(this.display)},defaultCharWidth:function(){return Pr(this.display)},getViewport:function(){return{from:this.display.viewFrom,to:this.display.viewTo}},addWidget:function(e,t,n,r,i){var o,l,a=this.display,s=(e=Sr(this,O(this.doc,e))).bottom,c=e.left;t.style.position="absolute",t.setAttribute("cm-ignore-events","true"),this.display.input.setUneditable(t),a.sizer.appendChild(t),"over"==r?s=e.top:"above"!=r&&"near"!=r||(l=Math.max(a.wrapper.clientHeight,this.doc.height),o=Math.max(a.sizer.clientWidth,a.lineSpace.clientWidth),("above"==r||e.bottom+t.offsetHeight>l)&&e.top>t.offsetHeight?s=e.top-t.offsetHeight:e.bottom+t.offsetHeight<=l&&(s=e.bottom),c+t.offsetWidth>o&&(c=o-t.offsetWidth)),t.style.top=s+"px",t.style.left=t.style.right="","right"==i?(c=a.sizer.clientWidth-t.offsetWidth,t.style.right="0px"):("left"==i?c=0:"middle"==i&&(c=(a.sizer.clientWidth-t.offsetWidth)/2),t.style.left=c+"px"),n&&(r=this,l={left:c,top:s,right:c+t.offsetWidth,bottom:s+t.offsetHeight},null!=(l=ii(r,l)).scrollTop&&ui(r,l.scrollTop),null!=l.scrollLeft&&hi(r,l.scrollLeft))},triggerOnKeyDown:xi(sl),triggerOnKeyPress:xi(ul),triggerOnKeyUp:cl,triggerOnMouseDown:xi(dl),execCommand:function(e){if(me.hasOwnProperty(e))return me[e].call(null,this)},triggerElectric:xi(function(e){Sl(this,e)}),findPosH:function(e,t,n,r){var i,o,l=1;for(t<0&&(l=-1,t=-t),i=O(this.doc,e),o=0;o<t&&!(i=Nl(this.doc,i,l,n,r)).hitSide;++o);return i},moveH:xi(function(t,n){var r=this;this.extendSelectionsBy(function(e){return r.display.shift||r.doc.extend||e.empty()?Nl(r.doc,e.head,t,n,r.options.rtlMoveVisually):t<0?e.from():e.to()},u)}),deleteH:xi(function(n,r){var e=this.doc.sel,i=this.doc;e.somethingSelected()?i.replaceSelection("",null,"+delete"):Qo(this,function(e){var t=Nl(i,e.head,n,r,!1);return n<0?{from:t,to:e.head}:{from:e.head,to:t}})}),findPosV:function(e,t,n,r){var i,o,l,a=1,s=r;for(t<0&&(a=-1,t=-t),i=O(this.doc,e),o=0;o<t&&(l=Sr(this,i,"div"),null==s?s=l.left:l.left=s,!(i=Al(this,l,a,n)).hitSide);++o);return i},moveV:xi(function(r,i){var e,o=this,l=this.doc,a=[],s=!this.display.shift&&!l.extend&&l.sel.somethingSelected();if(l.extendSelectionsBy(function(e){var t,n;return 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diff --git a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror.js b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror.js
index 03dd921dd45..91732ef20b3 100644
--- a/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror.js
+++ b/lib/editor/atto/plugins/html/yui/build/moodle-atto_html-codemirror/moodle-atto_html-codemirror.js
@@ -9871,7 +9871,7 @@ var define = null; // Remove require.js support in this context.
 
   addLegacyProps(CodeMirror);
 
-  CodeMirror.version = "5.65.12";
+  CodeMirror.version = "5.65.15";
 
   return CodeMirror;
 
diff --git a/lib/editor/atto/plugins/html/yui/src/codemirror/js/codemirror.js b/lib/editor/atto/plugins/html/yui/src/codemirror/js/codemirror.js
index b53a776aef9..156fc307dd9 100644
--- a/lib/editor/atto/plugins/html/yui/src/codemirror/js/codemirror.js
+++ b/lib/editor/atto/plugins/html/yui/src/codemirror/js/codemirror.js
@@ -9867,7 +9867,7 @@
 
   addLegacyProps(CodeMirror);
 
-  CodeMirror.version = "5.65.12";
+  CodeMirror.version = "5.65.15";
 
   return CodeMirror;
 
diff --git a/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt b/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
index abcdc60f431..6d3f8e9101a 100644
--- a/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
+++ b/lib/editor/atto/plugins/html/yui/src/codemirror/readme_moodle.txt
@@ -3,15 +3,16 @@ Description of importing the codemirror library into Moodle.
 NOTE: To make it more readable, in this explanation [LIBRARYPATH] means:
     [PATH TO YOUR MOODLE]/lib/editor/atto/plugins/html/yui/src/codemirror
 
-1 Download the latest codemirror code somewhere (example /tmp/cm) using: npm install codemirror OR download the zip file
-  (note down the version number displayed by the command, you'll need it later)
+1 Download the latest codemirror code somewhere (example /tmp/cm) using:
+
+mkdir -p codemirror/node_modules
+npm install --prefix codemirror codemirror@5 --save-dev
+
+Note down the version number displayed by the command, to update thirdpartylibs.xml accordingly.
 
 2 Then copy the following files to your local Moodle directory:
-If using npm install:
-[CODEMIRRORPATH] = node_modules
 
-If using the zip file:
-[CODEMIRRORPATH] = codemirror-X.XX.X
+[CODEMIRRORPATH] = codemirror/node_modules
 
 cp [CODEMIRRORPATH]/codemirror/lib/codemirror.js [LIBRARYPATH]/js
 cp [CODEMIRRORPATH]/codemirror/mode/css/css.js [LIBRARYPATH]/js