CVE-2021-39173

Cachet is an open source status page system. Prior to version 2.5.1 authenticated users, regardless of their privileges (User or Admin), can trick Cachet and install the instance again, leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

• CWE-704
• CWE-704

• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/Exploit, Third Party Advisory
• https://github.com/fiveai/Cachet/releases/tag/v2.5.1Release Notes, Third Party Advisory
• https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83Third Party Advisory
• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/Exploit, Third Party Advisory
• https://github.com/fiveai/Cachet/releases/tag/v2.5.1Release Notes, Third Party Advisory
• https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83Third Party Advisory

Published

Aug 27, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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