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Sanitize Supabase content before rendering #15

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Merged
marcelo-m7 merged 1 commit into from
Sep 20, 2025
Merged

Sanitize Supabase content before rendering #15

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29 changes: 21 additions & 8 deletions static/js/loaders.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,15 @@
(function () {
const messages = window.__FACODI_I18N__ || {};

function escapeHTML(value) {
return String(value)
.replace(/&/g, '&')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&#39;');
}

function resolve(path) {
if (!path) {
return undefined;
Expand Down Expand Up @@ -41,21 +50,25 @@
if (window.marked && typeof window.marked.parse === 'function') {
return window.marked.parse(md);
}
const escaped = md
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;');
const escaped = escapeHTML(md);
return '<p>' + escaped.replace(/\n{2,}/g, '</p><p>').replace(/\n/g, '<br />') + '</p>';
}

function toText(value, fallback = '—') {
const safeFallback = escapeHTML(fallback);
if (Array.isArray(value)) {
return value.length ? value.join(', ') : fallback;
if (!value.length) {
return safeFallback;
}
return value
.map((item) => (item === null || item === undefined ? '' : escapeHTML(item)))
.filter((item) => item.length > 0)
.join(', ') || safeFallback;
}
if (value === null || value === undefined || value === '') {
return fallback;
return safeFallback;
}
return value;
return escapeHTML(value);
}

function durationLabel(value) {
Expand Down Expand Up @@ -376,7 +389,7 @@
throw topicContentError;
}

const summaryHtml = topic.summary ? `<p class="fw-semibold">${topic.summary}</p>` : '';
const summaryHtml = topic.summary ? `<p class="fw-semibold">${escapeHTML(topic.summary)}</p>` : '';
if (topicContent && topicContent.content_md) {
contentEl.innerHTML = summaryHtml + renderMarkdown(topicContent.content_md);
} else {
Expand Down