Is CVE-2025-55291 in the CISA KEV catalog?

No. CVE-2025-55291 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-55291?

CVE-2025-55291 has a CVSS v3 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2025-55291?

CVE-2025-55291 has an EPSS score of 0.22% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-55291?

Upgrade shaarli on debian 12 to 0.12.1+dfsg-8+deb12u1 or later.

CVE & CISA-KEV Catalog

CVE-2025-55291

HIGH

7.1

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)CWE-80 CWE-87

How to fix

Remediation Available

shaarliDebian

Fixed in:0.12.1+dfsg-8+deb12u1CVE-2025-55291

Fixed in:0.14.0+dfsg-2CVE-2025-55291

Fixed in:0.15.0+dfsg-1CVE-2025-55291

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploit Intelligence

0.22%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-18.