{"id":"GHSA-r67m-m8c7-jp83","aliases":["CVE-2021-39173"],"title":"Cachet vulnerable to forced reinstall","description":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can trick Cachet and install the instance again, leading to arbitrary code execution on the server.\n\n### Patches\n\nThis issue was addressed by improving the middleware `ReadyForUse`, which now performs a stricter validation of the instance name. \n\n### Workarounds\n\nOnly allow trusted source IP addresses to access to the administration dashboard.\n\n### References\n\n- https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection\n\n### For more information\n\nIf you have any questions or comments about this advisory, you can contact:\n- The original reporters, by sending an email to vulnerability.research [at] sonarsource.com;\n- The maintainers, by opening an issue on this repository.\n","severity":"high","score":8.8,"published":"2021-08-30T16:11:33.000Z","modified":"2026-07-08T06:27:35.540Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"cachethq/cachet","ranges":[{"events":[{"introduced":"0"},{"fixed":"2.5.1"}],"type":"ECOSYSTEM"}],"versions":["v0.1.0-alpha","v1.0.0","v1.1.0","v1.1.1","v1.2.0","v1.2.1","v2.0.0","v2.0.0-RC1","v2.0.0-RC2","v2.0.0-RC3","v2.0.0-RC4","v2.0.0-RC5","v2.0.0-beta1","v2.0.0-beta2","v2.0.1","v2.0.2","v2.0.3","v2.0.4","v2.1.0","v2.1.0-RC1","v2.1.0-RC2","v2.1.1","v2.1.2","v2.2.0","v2.2.0-RC1","v2.2.1","v2.2.2","v2.2.3","v2.2.4","v2.3.0","v2.3.0-RC1","v2.3.0-RC2","v2.3.0-RC3","v2.3.0-RC4","v2.3.0-RC5","v2.3.0-RC6","v2.3.1","v2.3.10","v2.3.11","v2.3.12","v2.3.13","v2.3.14","v2.3.15","v2.3.16","v2.3.17","v2.3.18","v2.3.2","v2.3.3","v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.3.8","v2.3.9","v2.4.0","v2.4.1"],"fixed":["2.5.1"]}],"sourceAffected":[],"references":["https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83","https://nvd.nist.gov/vuln/detail/CVE-2021-39173","https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection","https://github.com/fiveai/Cachet","https://github.com/fiveai/Cachet/releases/tag/v2.5.1"],"sources":[{"name":"OSV","id":"GHSA-r67m-m8c7-jp83","modified":"2026-07-08T06:27:35.540114512Z","url":"https://osv.dev/vulnerability/GHSA-r67m-m8c7-jp83"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8}],"evidence":[]}