CVE-2026-82601 SeaCMS err.php cross site scripting
Remote attackers can execute arbitrary scripts in user browsers via the errtxt parameter in SeaCMS, potentially leading to session hijacking or malicious actions.
- 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-2026-82601?
CVE-2026-82601 is a medium-severity cross-site scripting vulnerability in SeaCMS, published on 31 Aug 2026. 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 weakness has been identified in SeaCMS up to 13.6. This affects an unknown part of the file /err.php. Executing a manipulation of the argument errtxt can lead to cross site scripting. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-82601?
How do I fix CVE-2026-82601?
No fix has been published for CVE-2026-82601 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-2026-82601 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82601 exists.
Sources
Also known as GHSA-hm5g-8j63-j96q.