Stored Cross-Site Scripting in FluentCMS by Fluent
CVE-2025-15549

4.8MEDIUM

Key Information:

Vendor

Fluentcms

Status
Fluentcms
Vendor
CVE Published:
29 January 2026

What is CVE-2025-15549?

FluentCMS 2026 is affected by a stored cross-site scripting vulnerability that enables authenticated administrators to upload SVG files containing embedded JavaScript through the File Management module. This flaw allows attackers to potentially upload malicious SVG files that execute arbitrary JavaScript in the browsers of users who access the URLs of these uploaded files, posing a significant security risk to any organization using this product.

Affected Version(s)

FluentCMS 0 <= 0.0.5

References

https://github.com/fluentcms/FluentCMS/issues/2404
issue-tracking
https://www.vulncheck.com/advisories/fluentcms-stored-xss...
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jarosław Wawiórko
.