CVE-2025-8555 atjiu pybbs search cross site scripting

Medium 5.1 Published 5 Aug 2025 Updated 5 Aug 2025

Remote attackers can inject malicious scripts via the search keyword parameter in pybbs, potentially leading to session hijacking or code execution.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-8555?

CVE-2025-8555 is a medium-severity cross-site scripting vulnerability in atjiu pybbs, published on 5 Aug 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability, which was classified as problematic, was found in atjiu pybbs up to 6.0.0. Affected is an unknown function of the file /search. The manipulation of the argument keyword leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 2fe4a51afbce0068c291bc1818bbc8f7f3b01a22. It is recommended to apply a patch to fix this issue.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2025-8555?

It affects 1 product.

Products include Pybbs Project Pybbs.

How do I fix CVE-2025-8555?

No fix has been published for CVE-2025-8555 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-2025-8555 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8555 exists.

Sources

Also known as GHSA-4h69-cjx4-hx8h.