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The vulnerability exists because the EmbedVideo extension does not properly sanitize the value of the `data-iframeconfig` attribute provided via wikitext. This attribute’s content is used to dynamically set other attributes on an HTML `
date: 2024-09-24
Prediction: 2024-10-08
What Undercode Say:
Searching for similar patterns in codebase grep -r "setAttribute" resources/ | grep -i "iframe" grep -r "data-iframeconfig" .
// Example of vulnerable code pattern
var config = iframe.getAttribute('data-iframeconfig');
var attributes = parseConfig(config);
for (var key in attributes) {
iframe.setAttribute(key, attributes[bash]); // Vulnerable line
}
How Exploit:
[[File:example.mp4|data-iframeconfig="onload=alert(document.cookie)"]]
Protection from this CVE:
Sanitize `data-iframeconfig` input
Use an allowlist for safe iframe attributes
Implement Content Security Policy headers
Impact:
Session hijacking
Account takeover
Defacement of wiki pages
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Sources:
Reported By: github.com
Extra Source Hub:
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