CVE-2026-63169
Omnispace Agora Project < 26.10.0 Stored XSS via Messenger Iframe
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 13, 2026
- Updated
- Oct 27, 2026
- Reserved
- Jul 15, 2026
Description
Omnispace Agora Project before 26.10.0 contains a stored cross-site scripting vulnerability that allows authenticated users to post messages containing attacker-controlled iframes through the messenger's HTMLPurifier SafeIframe branch. Attackers can craft a message with a malicious iframe that is stored and automatically rendered to other channel members, enabling zero-click drive-by downloads and framed JavaScript execution in recipients' browsers.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Agora ProjectOmnispace |
|
References
- Fixed Release Tagrelease-notespatch
- Project Webpageproduct
- VulnCheck Advisory: Omnispace Agora Project < 26.10.0 Stored XSS via Messenger Iframethird-party-advisory
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