CVE-2025-7786 Gnuboard g6 Post Reply qa cross site scripting
Remote attackers can inject malicious scripts via the Post Reply Handler in Gnuboard g6, potentially leading to code execution or account takeover.
- 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-2025-7786?
CVE-2025-7786 is a medium-severity cross-site scripting vulnerability in Gnuboard g6, published on 18 Jul 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, has been found in Gnuboard g6 up to 6.0.10. This issue affects some unknown processing of the file /bbs/scrap_popin_update/qa/ of the component Post Reply Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-7786?
It affects 1 product.
Products include Sir Gnuboard.
How do I fix CVE-2025-7786?
No fix has been published for CVE-2025-7786 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-2025-7786 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7786 exists.
Other vulnerabilities in Gnuboard g6
Sources
Also known as GHSA-9ch4-p9xc-vmxf.