CVE-2025-55291 Shaarli allows reflected XSS via searchtags parameter
Attackers can execute arbitrary scripts in victim browsers via the searchtags parameter in Shaarli, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-55291?
CVE-2025-55291 is a high-severity cross-site scripting vulnerability in Shaarli, published on 18 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Shaarli is a minimalist bookmark manager and link sharing service. Prior to 0.15.0, the input string in the cloud tag page is not properly sanitized. This allows the </title> tag to be prematurely closed, leading to a reflected Cross-Site Scripting (XSS) vulnerability. This vulnerability is fixed in 0.15.0.
Which versions are affected by CVE-2025-55291?
How do I fix CVE-2025-55291?
Upgrade to a fixed version.
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-2025-55291 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55291 exists.
Sources
Also known as DEBIAN-CVE-2025-55291, GHSA-7w7w-pw4j-265h, UBUNTU-CVE-2025-55291.