CVE-2026-63171 Omnispace Agora Project < 26.10.0 Stored XSS via Category Description
Authenticated attackers can inject malicious scripts via forum category descriptions, leading to arbitrary code execution in victim browsers.
- 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-2026-63171?
CVE-2026-63171 is a medium-severity cross-site scripting vulnerability in Omnispace Agora Project, published on 13 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Omnispace Agora Project before 26.10.0 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious script by submitting a crafted forum category description containing a double-quote character that breaks out of an HTML input value attribute. Attackers can exploit the HTMLPurifier configuration that preserves double-quotes to escape the attribute context and execute arbitrary script in the browser of users viewing the forum category.
Weakness: CWE-79
Which versions are affected by CVE-2026-63171?
How do I fix CVE-2026-63171?
No fix has been published for CVE-2026-63171 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-2026-63171 being exploited?
There is no known exploitation of CVE-2026-63171 in the wild and no public exploit code.
Sources
Also known as GHSA-r6mm-4cpq-p3fg.