Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck

CVE-2026-63156Omnispace Agora Project < 26.10.0 Reflected XSS via visioUrl Parameter

Medium 6.1

In plain English

A medium-severity cross-site scripting in Agora Project from Omnispace. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 76.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Omnispace	Agora Project	0 – before 26.10.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Fixed Release Tag release-notes, patch
Project Webpage product
VulnCheck Advisory: Omnispace Agora Project < 26.10.0 Reflected XSS via visioUrl Parameter third-party-advisory