CVE-2025-62693 Stored XSS through system messages in LastModified
Stored XSS in MediaWiki LastModified Extension allows attackers to inject scripts via system messages, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62693?
CVE-2025-62693 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - LastModified Extension, published on 20 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - LastModified Extension allows Stored XSS.This issue affects Mediawiki - LastModified Extension: from master before 1.39.
Weakness: CWE-79
Which versions are affected by CVE-2025-62693?
How do I fix CVE-2025-62693?
No fix has been published for CVE-2025-62693 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-62693 being exploited?
There is no known exploitation of CVE-2025-62693 in the wild and no public exploit code.
Sources
Also known as GHSA-v5fj-7w6r-wr6q, UBUNTU-CVE-2025-62693.