CVE-2025-62654 Stored XSS through system messages in QuizGame
Stored XSS in MediaWiki QuizGame extension allows attackers to inject scripts via system messages, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-62654?
CVE-2025-62654 is a low-severity cross-site scripting vulnerability in The Wikimedia Foundation MediaWiki QuizGame extension, published on 17 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation MediaWiki QuizGame extension allows Stored XSS.This issue affects MediaWiki QuizGame extension: 1.39, 1.43, 1.44.
Weakness: CWE-79
Which versions are affected by CVE-2025-62654?
How do I fix CVE-2025-62654?
No fix has been published for CVE-2025-62654 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-2025-62654 being exploited?
There is no known exploitation of CVE-2025-62654 in the wild and no public exploit code.
Sources
Also known as GHSA-597q-g6cw-53xv.