CVE-2025-15549 FluentCMS 2026 Stored XSS via SVG Upload in File Management
Authenticated administrators can upload malicious SVG files in FluentCMS, leading to stored XSS and potential account takeover for other users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-15549?
CVE-2025-15549 is a medium-severity cross-site scripting vulnerability in FluentCMS, published on 29 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-15549?
It affects 1 product.
Products include Fluentcms Fluentcms.
How do I fix CVE-2025-15549?
No fix has been published for CVE-2025-15549 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-15549 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15549 exists.
Other vulnerabilities in FluentCMS
Sources
Also known as GHSA-pvgm-mg5q-xc76.