{"id":"CVE-2021-39174","aliases":["GHSA-88f9-7xxh-c688"],"url":"https://o3.security/vulnerability/CVE-2021-39174","summary":"Cachet configuration leak","details":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can leak the value of any configuration entry of the dotenv file, e.g. the application secret (`APP_KEY`) and various passwords (email, database, etc). \n\n### Patches\n\nThis issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of nested variables in the resulting dotenv configuration file.\n\n### Workarounds\n\nOnly allow trusted source IP addresses to access to the administration dashboard.\n\n### References\n\nFurther technical details are available at [https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection](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","published":"2021-08-28T00:15:06.917Z","modified":"2026-07-31T14:06:44.768116Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.03894,"percentile":0.89477,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"Packagist","name":"cachethq/cachet","fixedVersion":"2.5.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/fiveai/Cachet/releases/tag/v2.5.1"},{"type":"ADVISORY","url":"https://github.com/fiveai/Cachet/security/advisories/GHSA-88f9-7xxh-c688"},{"type":"EVIDENCE","url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39174"},{"type":"WEB","url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection"},{"type":"PACKAGE","url":"https://github.com/cachethq/Cachet"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T14:06:44.768116Z"}}