CVE-2026-6159 code-projects Simple ChatBox Endpoint insert.php cross site scripting
Remote attackers can inject malicious scripts via the msg parameter in insert.php, potentially compromising user sessions or executing code.
- 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-2026-6159?
CVE-2026-6159 is a medium-severity cross-site scripting vulnerability in code-projects Simple ChatBox, published on 13 Apr 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 vulnerability has been found in code-projects Simple ChatBox up to 1.0. Affected by this vulnerability is an unknown functionality of the file /chatbox/insert.php of the component Endpoint. Such manipulation of the argument msg leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-6159?
How do I fix CVE-2026-6159?
No fix has been published for CVE-2026-6159 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-2026-6159 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6159 exists.
Sources
Also known as GHSA-hh82-cfxx-fmf9.