CVE-2026-63156

CVSS 6.1 (medium) · published 2026-10-13

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

Source: NVD CVE-2026-63156

References

• https://github.com/xech/agora-project/releases/tag/26.10
• https://www.agora-project.net/
• https://www.akailabs.fr/blog/multiple-vulnerabilities-in-agora-project-26-5-2#cve-2026-63156-reflected-xss-via-visiourl-parameter
• https://www.vulncheck.com/advisories/omnispace-agora-project-reflected-xss-via-visiourl-parameter

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