XSS in Fluentcms

CVE-2025-15549

FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute JavaScript in the browser of any user accessing the uploaded file URL.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-15549?
CVE-2025-15549 is a medium-severity vulnerability in Fluentcms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-01-29.
How severe is CVE-2025-15549?
Medium severity. CVSS v3 base score is 4.8 out of 10.