Medium severity · published Oct 13, 2026
CVE-2026-63169
Omnispace Agora Project < 26.10.0 Stored XSS via Messenger Iframe
6.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
Agora Project · Omnispace
before 26.10.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63169
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63169
release-notes
https://github.com/xech/agora-project/releases/tag/26.10
product
https://www.agora-project.net/
third-party-advisory
https://www.vulncheck.com/advisories/omnispace-agora-project-stored-xss-via-messenger-iframe
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