CVE-2025-55291: Shaarli allows reflected XSS via searchtags parameter

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-18 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Shaarli: before 0.15.0

References

https://github.com/shaarli/Shaarli/commit/66faa61335a6e72184be64092ff1242ffa4fe5b6
https://github.com/shaarli/Shaarli/security/advisories/GHSA-7w7w-pw4j-265h

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