XSS in Omnispace Agora Project
CVE-2026-63156
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/xech/agora-project/releases/tag/26.10 (release-notes, patch)
- www.agora-project.net/ (product)
- www.vulncheck.com/advisories/omnispace-agora-project-reflected-xss-via-visiourl… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63156?
- CVE-2026-63156 is a medium-severity vulnerability in Omnispace Agora Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-13.
- How severe is CVE-2026-63156?
- Medium severity. CVSS v3 base score is 6.1 out of 10.