XSS in Shaarli
CVE-2025-55291
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…
EPSS: 0.000 (10.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
Affected products
- Shaarli — versions < 0.15.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/shaarli/Shaarli/security/advisories/GHSA-7w7w-pw4j-265h (x_refsource_CONFIRM)
- https://github.com/shaarli/Shaarli/commit/66faa61335a6e72184be64092ff1242ffa4fe5b6 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-55291?
- CVE-2025-55291 is a high-severity vulnerability in Shaarli, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 7.1/10. Published 2025-08-18.
- How severe is CVE-2025-55291?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2025-55291 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.