{"id":"CVE-2023-37266","aliases":["EUVD-2023-2095","GHSA-m5q5-8mfw-p2hr","GO-2023-1931"],"status":"published","title":"Weak json web token (JWT) secrets in CasaOS","description":"CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.06844,"percentile":0.94113,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1391","CWE-287"],"published":"2023-07-17T14:40:16Z","modified":"2026-10-28T02:30:34Z","exploits":[{"source":"nuclei","id":"CVE-2023-37266","title":"CasaOS  \u003c 0.4.4 - Authentication Bypass via Random JWT Token","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-37266.yaml"}],"fixes":[{"ecosystem":"Go","package":"github.com/IceWhaleTech/CasaOS","fixed_in":["0.4.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/IceWhaleTech/CasaOS","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/IceWhaleTech/CasaOS","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.4.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/IceWhaleTech/CasaOS","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.4.4"}]}]}],"products":[{"vendor":"icewhale","product":"casaos"},{"vendor":"icewhale tech","product":"casaos"},{"vendor":"icewhaletech","product":"casaos"}],"references":[{"url":"https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hr","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","advisory","web"]},{"url":"https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657ad","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://www.sonarsource.com/blog/security-vulnerabilities-in-casaos","tags":["x_refsource_MISC","Exploit","Third Party Advisory","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37266","tags":["advisory"]},{"url":"https://pkg.go.dev/vuln/GO-2023-1931","tags":["web"]},{"url":"https://github.com/advisories/GHSA-m5q5-8mfw-p2hr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37266.json","tags":["advisory"]},{"url":"https://github.com/IceWhaleTech/CasaOS","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-37266","title":"Weak json web token (JWT) secrets in CasaOS","description":"CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.","status":"published","published":"2023-07-17T20:57:43.078Z","modified":"2024-12-12T20:51:16.121Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:35:16.126506Z"}],"euvd":[{"id":"EUVD-2023-2095","description":"CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.","status":"published","published":"2023-07-17T20:57:43Z","modified":"2024-12-12T20:51:16Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:04:36.024922Z"}],"ghsa":[{"id":"GHSA-m5q5-8mfw-p2hr","title":"CasaOS contains weak JWT secrets","description":"### Impact\n\nUnauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances.\n\n### Patches\n\nThe problem was addressed by improving the validation of JWTs in 705bf1f. This patch is part of CasaOS 0.4.4.\n\n### Workarounds\n\nUsers should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.\n\n### References\n\n- 705bf1f\n- https://www.sonarsource.com/blog/security-vulnerabilities-in-casaos/\n","status":"published","published":"2023-07-17T14:40:16Z","modified":"2024-12-12T22:30:04Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287","CWE-1391"],"updated_at":"2026-11-02T14:38:25.334027Z"}],"nvd":[{"id":"CVE-2023-37266","description":"CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.","status":"published","published":"2023-07-17T21:15:09.733Z","modified":"2026-06-17T06:07:50.98Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:08:17.044696Z"}],"osv":[{"id":"CVE-2023-37266","title":"Weak json web token (JWT) secrets in CasaOS","description":"CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.","status":"published","published":"2023-07-17T20:57:43.078Z","modified":"2026-10-28T02:30:34.353916935Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:32.510144Z"},{"id":"GHSA-m5q5-8mfw-p2hr","title":"CasaOS contains weak JWT secrets","description":"### Impact\n\nUnauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances.\n\n### Patches\n\nThe problem was addressed by improving the validation of JWTs in 705bf1f. This patch is part of CasaOS 0.4.4.\n\n### Workarounds\n\nUsers should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.\n\n### References\n\n- 705bf1f\n- https://www.sonarsource.com/blog/security-vulnerabilities-in-casaos/\n","status":"published","published":"2023-07-17T14:40:16Z","modified":"2024-12-12T22:30:02Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-1391","CWE-287"],"updated_at":"2026-11-02T15:46:51.463834Z"},{"id":"GO-2023-1931","title":"CasaOS contains weak JWT secrets in github.com/IceWhaleTech/CasaOS","description":"CasaOS contains weak JWT secrets in github.com/IceWhaleTech/CasaOS","status":"published","published":"2024-08-20T20:31:38Z","modified":"2026-03-03T04:54:00.306643Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}