Impersonation and stored XSS via username bypass
Published Jun 23, 2026 · Updated Jun 23, 2026
Username validation bypass in Revive Adserver 6.0.6 and earlier allows remote attackers to create impersonating or XSS-bearing usernames. The XML-RPC addUser method fails to apply required username validation, so crafted names are accepted and stored as user records. Reachability requires network access to the XML-RPC API; accepted names can impersonate trusted accounts or execute stored script when rendered.
Summary
What happened
Username validation bypass in Revive Adserver 6.0.6 and earlier allows remote attackers to create impersonating or XSS-bearing usernames. The XML-RPC addUser method fails to apply required username validation, so crafted names are accepted and stored as user records. Reachability requires network access to the XML-RPC API; accepted names can impersonate trusted accounts or execute stored script when rendered.
The record
- CVE
- CVE-2026-44961
- Published
- Jun 23, 2026
- Updated
- Jun 23, 2026
- Vendor
- Revive Adserver Project
- Product
- Revive Adserver
- Classifications
- CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 23, 2026CVE publishedPublication date reported by the CVE source.
- Jun 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=6.0.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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