From a06a14477bd26a8d82522257205c2e9cb67c5527 Mon Sep 17 00:00:00 2001 From: "google-labs-jules[bot]" <161369871+google-labs-jules[bot]@users.noreply.github.com> Date: Wed, 16 Sep 2026 18:24:16 +0000 Subject: [PATCH] =?UTF-8?q?=F0=9F=94=92=20Fix=20XSS=20vulnerability=20usin?= =?UTF-8?q?g=20DOMPurify?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sanitize HTML before assigning to innerHTML. --- extension/sidepanel/index.html | 2 +- extension/sidepanel/purify.min.js | 3 +++ extension/sidepanel/sidepanel.js | 12 ++++++------ test/test-sidepanel-dom.js | 3 +++ 4 files changed, 13 insertions(+), 7 deletions(-) create mode 100644 extension/sidepanel/purify.min.js diff --git a/extension/sidepanel/index.html b/extension/sidepanel/index.html index 0a5a794..66b73ac 100644 --- a/extension/sidepanel/index.html +++ b/extension/sidepanel/index.html @@ -116,7 +116,7 @@

Privacy & FERPA Commitment

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0!==arguments[1]?arguments[1]:{},n=null,r=null,i=null,l=null;if(Ve=!e,Ve&&(e="\x3c!--\x3e"),"string"!=typeof e&&!Tt(e)){if("function"!=typeof e.toString)throw A("toString is not a function");if("string"!=typeof(e=e.toString()))throw A("dirty is not a string, aborting")}if(!o.isSupported)return e;if(Le||it(t),o.removed=[],"string"==typeof e&&(Pe=!1),Pe){if(e.nodeName){const t=tt(e.nodeName);if(!he[t]||Ae[t])throw A("root node is forbidden and cannot be sanitized in-place")}}else if(e instanceof N)n=dt("\x3c!----\x3e"),r=n.ownerDocument.importNode(e,!0),1===r.nodeType&&"BODY"===r.nodeName||"HTML"===r.nodeName?n=r:n.appendChild(r);else{if(!xe&&!we&&!De&&-1===e.indexOf("<"))return Q&&Ce?Q.createHTML(e):e;if(n=dt(e),!n)return xe?null:Ce?ee:""}n&&ve&&ft(n.firstChild);const c=ht(Pe?e:n);for(;i=c.nextNode();)Et(i)||(i.content instanceof s&&bt(i.content),Nt(i));if(Pe)return e;if(xe){if(ke)for(l=oe.call(n.ownerDocument);n.firstChild;)l.appendChild(n.firstChild);else l=n;return(Te.shadowroot||Te.shadowrootmode)&&(l=ie.call(a,l,!0)),l}let m=De?n.outerHTML:n.innerHTML;return De&&he["!doctype"]&&n.ownerDocument&&n.ownerDocument.doctype&&n.ownerDocument.doctype.name&&E(j,n.ownerDocument.doctype.name)&&(m="\n"+m),we&&u([le,ce,se],(e=>{m=g(m,e," ")})),Q&&Ce?Q.createHTML(m):m},o.setConfig=function(){let e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};it(e),Le=!0},o.clearConfig=function(){nt=null,Le=!1},o.isValidAttribute=function(e,t,n){nt||it({});const o=tt(e),r=tt(t);return At(o,r,n)},o.addHook=function(e,t){"function"==typeof t&&(ae[e]=ae[e]||[],f(ae[e],t))},o.removeHook=function(e){if(ae[e])return m(ae[e])},o.removeHooks=function(e){ae[e]&&(ae[e]=[])},o.removeAllHooks=function(){ae={}},o}();return V})); +//# sourceMappingURL=purify.min.js.map diff --git a/extension/sidepanel/sidepanel.js b/extension/sidepanel/sidepanel.js index 38992de..3d3b3b5 100644 --- a/extension/sidepanel/sidepanel.js +++ b/extension/sidepanel/sidepanel.js @@ -44,7 +44,7 @@ export async function updateDossierUI() { if (!listEl) return; try { const dossier = await getDossier(); - listEl.innerHTML = renderDossierListHTML(dossier); + listEl.innerHTML = DOMPurify.sanitize(renderDossierListHTML(dossier)); listEl.querySelectorAll('.dossier-delete-btn').forEach((btn) => { btn.addEventListener('click', async (e) => { @@ -57,7 +57,7 @@ export async function updateDossierUI() { }); }); } catch (e) { - listEl.innerHTML = '

Error loading dossier.

'; + listEl.innerHTML = DOMPurify.sanitize('

Error loading dossier.

'); } } @@ -149,7 +149,7 @@ export function renderResults(data) { const container = document.getElementById('results-container'); if (!container) return; - container.innerHTML = renderAuditHTML(data); + container.innerHTML = DOMPurify.sanitize(renderAuditHTML(data)); const copyBtn = document.getElementById('copy-improved-btn'); if (copyBtn) { @@ -177,7 +177,7 @@ export function renderResults(data) { btn.addEventListener('click', (e) => { const parent = e.target.parentElement; if (parent) { - parent.innerHTML = 'Thank you for your feedback!'; + parent.innerHTML = DOMPurify.sanitize('Thank you for your feedback!'); } }); }); @@ -198,7 +198,7 @@ export function renderError(errorMessage) { .replace(/'/g, ''') : 'Unknown error occurred during audit.'; - container.innerHTML = ` + container.innerHTML = DOMPurify.sanitize(`
⚠️ @@ -210,7 +210,7 @@ export function renderError(errorMessage) {
- `; + `); const retryBtn = document.getElementById('error-retry-btn'); if (retryBtn) { diff --git a/test/test-sidepanel-dom.js b/test/test-sidepanel-dom.js index 88abd49..c6afbc9 100644 --- a/test/test-sidepanel-dom.js +++ b/test/test-sidepanel-dom.js @@ -23,6 +23,9 @@ assert.ok(html.includes('id="page-type-tag"'), 'Page type tag must exist'); assert.ok(html.includes('id="page-title"'), 'Page title heading must exist'); assert.ok(html.includes('id="loader-status"'), 'Loader status text must exist'); +// Security +assert.ok(html.includes('src="purify.min.js"'), 'HTML must load DOMPurify (purify.min.js)'); + // Typography and external font loading assert.ok(html.includes('Source+Serif+4') || html.includes('Source Serif 4'), 'HTML must load Source Serif 4'); assert.ok(html.includes('Public+Sans') || html.includes('Public Sans'), 'HTML must load Public Sans');