CVE-2025-25287 Lakeus vulnerable to stored XSS via system messages
Attackers with editinterface rights can inject malicious HTML into system messages, leading to stored XSS affecting users who enable specific features or view footers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-25287?
CVE-2025-25287 is a medium-severity cross-site scripting vulnerability in lakejason0 mediawiki-skins-Lakeus, published on 13 Feb 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Lakeus is a simple skin made for MediaWiki. Starting in version 1.0.8 and prior to versions 1.3.1+REL1.39, 1.3.1+REL1.42, and 1.4.0, Lakeus is vulnerable to store cross-site scripting via malicious system messages, though editing the messages requires high privileges. Those with `(editinterface)` rights can edit system messages that are improperly handled in order to send raw HTML. In the case of `lakeus-footermessage`, this will affect all users if the server is configured to link back to this repository. Otherwise, the system messages in themeDesigner.js are only used when the user enables it in their preferences. Versions 1.3.1+REL1.39, 1.3.1+REL1.42, and 1.4.0 contain a patch.
Weakness: CWE-79
Which versions are affected by CVE-2025-25287?
How do I fix CVE-2025-25287?
No fix has been published for CVE-2025-25287 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-2025-25287 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-25287 exists.
Sources
Also known as GHSA-mq77-3q68-v64v.