What’s Vulnerable › Vulnerabilities

CVE-2024-26135: MeshCentral cross-site websocket hijacking (CSWSH) vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-20 · updated 2026-06-17
• Weakness: CWE-346

Description

MeshCentral is a full computer management web site. Versions prior to 1.1.21 a cross-site websocket hijacking (CSWSH) vulnerability within the control.ashx endpoint. This component is the primary mechanism used within MeshCentral to perform administrative actions on the server. The vulnerability is exploitable when an attacker is able to convince a victim end-user to click on a malicious link to a page hosting an attacker-controlled site. The attacker can then originate a cross-site websocket connection using client-side JavaScript code to connect to `control.ashx` as the victim user within MeshCentral. Version 1.1.21 contains a patch for this issue.

Affected products

• Ylianst MeshCentral: before 1.1.21 — fixed in 1.1.21

How to fix

Upgrade to a fixed version: Ylianst MeshCentral 1.1.21. Check the vendor advisory for mitigations.

References

• https://github.com/Ylianst/MeshCentral/commit/f2e43cc6da9f5447dbff0948e6c6024c8a315af3
• https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8
• https://github.com/Ylianst/MeshCentral/commit/f2e43cc6da9f5447dbff0948e6c6024c8a315af3
• https://github.com/Ylianst/MeshCentral/security/advisories/GHSA-cp68-qrhr-g9h8

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