CVE-2025-6590 Complete content leak of private wikis due to PasswordReset Wikitext injection in error message
Attackers can leak complete content from private wikis via wikitext injection in password reset error messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-6590?
CVE-2025-6590 is a medium-severity vulnerability in Wikimedia Foundation MediaWiki, published on 2 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php.
This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.
Weakness: CWE-200
Which versions are affected by CVE-2025-6590?
How do I fix CVE-2025-6590?
Upgrade to a fixed version.
Is CVE-2025-6590 being exploited?
There is no known exploitation of CVE-2025-6590 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-6590, GHSA-gc6v-8f4f-xvwp, UBUNTU-CVE-2025-6590.