Quick answers
- Is CVE-2025-15549 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-15549 being exploited in the wild.
- How severe is CVE-2025-15549?
- Medium severity, with a CVSS score of 4.8, published 29 January 2026.
- Which products and versions are affected?
- FluentCMS FluentCMS up to and including 0.0.5.
- Is there a fix for CVE-2025-15549?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-15549 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2025-15549?
- Check whether you run Fluentcms. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stored cross-site scripting (XSS) vulnerability exists in the File Management module of FluentCMS versions up to 0.0.5. The application fails to sanitize SVG file uploads, which can contain embedded <script> tags. An authenticated administrator can upload a malicious SVG file that, when accessed via its public URL, executes arbitrary JavaScript in the context of the victim's browser session. This occurs because the files are served from a public directory without restrictive security headers. The vulnerability is tracked as CVE-2025-15549 and requires administrative privileges to exploit.
Affected products
- FluentCMS FluentCMS up to and including 0.0.5
Timeline
- 2026-01-01: disclosed: Issue reported on GitHub by researcher
- 2026-01-29: advisory: NVD and VulnCheck published advisory