CVE-2025-13803 MediaCrush Header paths.py http headers for scripting syntax
Remote attackers can inject malicious scripts via the Host header in MediaCrush, potentially executing code or bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13803?
CVE-2025-13803 is a medium-severity cross-site scripting vulnerability in MediaCrush, published on 1 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in MediaCrush 1.0.0/1.0.1. The affected element is an unknown function of the file /mediacrush/paths.py of the component Header Handler. Such manipulation of the argument Host leads to improper neutralization of http headers for scripting syntax. The attack can be launched remotely.
Weakness: CWE-644
Which versions are affected by CVE-2025-13803?
How do I fix CVE-2025-13803?
No fix has been published for CVE-2025-13803 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-2025-13803 being exploited?
There is no known exploitation of CVE-2025-13803 in the wild and no public exploit code.
Sources
Also known as GHSA-3rcp-jp25-8fmh.