Administrative account compromise via unchecked WebSocket origin
Published Feb 20, 2024 · Updated Apr 22, 2025
Cross-site WebSocket hijacking in MeshCentral before 1.1.21 allows remote attackers to execute administrative actions via control.ashx. The endpoint accepts authenticated cross-origin WebSocket requests without validating the Origin header, allowing malicious JavaScript to issue actions under the victim's session. A logged-in administrator must visit an attacker-controlled same-site page; exploitation exposes the server configuration and sessionKey and enables persistent account and managed-node access.
Summary
What happened
Cross-site WebSocket hijacking in MeshCentral before 1.1.21 allows remote attackers to execute administrative actions via control.ashx. The endpoint accepts authenticated cross-origin WebSocket requests without validating the Origin header, allowing malicious JavaScript to issue actions under the victim's session. A logged-in administrator must visit an attacker-controlled same-site page; exploitation exposes the server configuration and sessionKey and enables persistent account and managed-node access.
The record
- CVE
- CVE-2024-26135
- Published
- Feb 20, 2024
- Updated
- Apr 22, 2025
- Vendor
- Ylian Saint-Hilaire
- Product
- MeshCentral
- Classifications
- CWE-346, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 20, 2024CVE publishedPublication date reported by the CVE source.
- Apr 22, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.1.21
- Affected versionversion=< 1.1.21
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Praetorian cross-site WebSocket hijacking proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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