Auth bypass in Revive Adserver
CVE-2026-44961
The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.
Vulnerability class: Broken Authentication
EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.
Affected products
- Revive Adserver — versions 0