CVE-2025-55420 Cross-site scripting in n/a
Reflected XSS in FoxCMS allows attackers to execute arbitrary JavaScript in the context of logged-in users via crafted GET requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-55420?
CVE-2025-55420 is a high-severity cross-site scripting vulnerability in n/a, published on 21 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A Reflected Cross Site Scripting (XSS) vulnerability was found in /index.php in FoxCMS v1.2.6. When a crafted script is sent via a GET request, it is reflected unsanitized into the HTML response. This permits execution of arbitrary JavaScript code when a logged-in user submits the malicious input.
Weakness: CWE-79
Which versions are affected by CVE-2025-55420?
It affects 1 product.
Products include Foxcms Foxcms.
How do I fix CVE-2025-55420?
No fix has been published for CVE-2025-55420 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-2025-55420 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55420 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-x4w6-26rw-r6h9.