CVE-2026-63156 Omnispace Agora Project < 26.10.0 Reflected XSS via visioUrl Parameter
Unauthenticated attackers can execute arbitrary JavaScript in victims' browsers via a malicious visioUrl parameter in Omnispace Agora Project.
- 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-2026-63156?
CVE-2026-63156 is a medium-severity cross-site scripting vulnerability in Omnispace Agora Project, published on 13 Oct 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
Omnispace Agora Project before 26.10.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious HTML attributes by manipulating the visioUrl parameter, which was not routed through the URL-sanitizing branch of the parameter filter and was urldecoded after filtering. Attackers can craft a malicious URL containing the visioUrl parameter with an attribute breakout payload to execute arbitrary JavaScript in the victim's browser pre-authentication, with the issue fixed in version 26.10.0 via changes to app/Common/Req.php.
Weakness: CWE-79
Which versions are affected by CVE-2026-63156?
How do I fix CVE-2026-63156?
No fix has been published for CVE-2026-63156 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-2026-63156 being exploited?
There is no known exploitation of CVE-2026-63156 in the wild and no public exploit code.
Sources
Also known as GHSA-mwm7-gw2j-5q99.