{"id":"CVE-2021-39172","aliases":["EUVD-2021-1662","GHSA-9jxw-cfrh-jxq6"],"status":"published","title":"New line injection during configuration edition","description":"Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.29172,"percentile":0.98194,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-93"],"published":"2021-08-27T22:50:09Z","modified":"2026-10-20T10:54:53Z","exploits":[{"source":"pocgithub","id":"W1ngLess/CVE-2021-39172-RCE","title":"W1ngLess/CVE-2021-39172-RCE","date":"2022-09-17","url":"https://github.com/W1ngLess/CVE-2021-39172-RCE"}],"fixes":[{"ecosystem":"Packagist","package":"cachethq/cachet","fixed_in":["2.5.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"cachethq/cachet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"cachethq/cachet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.1"}]}],"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"]}],"products":[{"vendor":"cachethq","product":"cachet"},{"vendor":"catchethq","product":"catchet"},{"vendor":"fiveai","product":"cachet"}],"references":[{"url":"https://github.com/fiveai/Cachet/security/advisories/GHSA-9jxw-cfrh-jxq6","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/fiveai/Cachet/releases/tag/v2.5.1","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39172","tags":["advisory"]},{"url":"https://github.com/fiveai/Cachet/commit/6442976c25930cb370c65a22784b9caee7ed1de2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-9jxw-cfrh-jxq6"},{"url":"https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection","tags":["web"]},{"url":"https://github.com/fiveai/Cachet","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-39172","title":"New line injection during configuration edition","description":"Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T22:50:09Z","modified":"2024-08-04T01:58:18.282Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-1662","description":"Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T22:50:09Z","modified":"2024-08-04T01:58:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:24:24.305495Z"}],"ghsa":[{"id":"GHSA-9jxw-cfrh-jxq6","title":"Cachet vulnerable to new line injection during configuration edition","description":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server.\n\n### Patches\n\nThis issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values.\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","status":"published","published":"2021-08-30T16:11:24Z","modified":"2023-05-22T16:23:34Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:36:53.103029Z"}],"nvd":[{"id":"CVE-2021-39172","description":"Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:15:06.9Z","modified":"2026-06-17T04:03:14.67Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T14:06:57.67549Z"}],"osv":[{"id":"CVE-2021-39172","description":"Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.","status":"published","published":"2021-08-27T23:15:06.9Z","modified":"2026-10-20T10:54:53.783065732Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"GHSA-9jxw-cfrh-jxq6","title":"Cachet vulnerable to new line injection during configuration edition","description":"### Impact\n\nAuthenticated users, regardless of their privileges (_User_ or _Admin_), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server.\n\n### Patches\n\nThis issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values.\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","status":"published","published":"2021-08-30T16:11:24Z","modified":"2026-07-08T06:28:23.404206493Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-93"],"updated_at":"2026-11-02T15:46:43.875515Z"}]}}