CVE-2026-44961 Details
Description
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.
A vulnerability has been identified in the XML-RPC API 'addUser' method of Revive Adserver, allowing for a validation bypass that could lead to impersonation or stored cross-site scripting (XSS) attacks. This issue arises from the 'addUser' method bypassing validation rules, enabling API users to create usernames that could be exploited for impersonation or to inject malicious scripts that would be executed when an admin viewed the audit log. The vulnerability affects all versions of Revive Adserver that include the flawed XML-RPC API validation.
Revive Adserver has added proper validation to the 'addUser' method and improved output sanitization for audit log details. Users should update to the latest version of Revive Adserver to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 23, 2026CISA-ADP
Assessed Jun 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://hackerone.com/reports/3680090 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Revive Adserver | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 23, 2026 | CVE Modified | CISA-ADP |
| Jun 23, 2026 | New CVE Received | [email protected] |