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The CVE-2025-21800 vulnerability is a Cross-Site Scripting (XSS) flaw within the Blogs widget of Liferay Portal and Liferay DXP. The vulnerability exists because the application fails to properly sanitize user-supplied input within a blog entry’s “Content” text field. Specifically, the widget does not apply a `sandbox` attribute to `
Prediction: 2025-11-13
What Undercode Say:
curl -s "https://api.github.com/advisories" | jq '.[] | select(.severity=="moderate")'
<iframe src="javascript:alert(document.cookie)"></iframe>
How Exploit:
Inject malicious iframe into blog content.
Steal user session cookies.
Perform actions as authenticated user.
Protection from this CVE:
Apply official patch.
Sanitize user HTML input.
Implement Content Security Policy.
Impact:
Session Hijacking
Website Defacement
Privilege Escalation
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Sources:
Reported By: github.com
Extra Source Hub:
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