{"id":"CVE-2018-1000531","aliases":["EUVD-2018-1923","GHSA-jc5h-g7j7-qh2w"],"status":"published","title":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a...","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01637,"percentile":0.76651,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-20"],"published":"2018-06-26T16:00:00Z","modified":"2026-10-24T10:47:37Z","exploits":[{"source":"pocgithub","id":"realbatuhan/JWT-Bruteforcer","title":"realbatuhan/JWT-Bruteforcer","date":"2024-11-15","url":"https://github.com/realbatuhan/JWT-Bruteforcer"}],"products":[{"vendor":"inversoft","product":"prime-jwt"}],"references":[{"url":"https://github.com/inversoft/prime-jwt/issues/3","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-1000531"},{"url":"https://github.com/advisories/GHSA-jc5h-g7j7-qh2w"}],"sources":{"cve":[{"id":"CVE-2018-1000531","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","status":"published","published":"2018-06-26T16:00:00Z","modified":"2024-08-05T12:40:47.261Z","updated_at":"2026-11-02T14:35:10.685174Z"}],"euvd":[{"id":"EUVD-2018-1923","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","status":"published","published":"2018-06-26T16:00:00Z","modified":"2024-08-05T12:40:47Z","updated_at":"2026-11-03T02:39:26.268404Z"}],"ghsa":[{"id":"GHSA-jc5h-g7j7-qh2w","title":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a...","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","status":"published","published":"2022-05-14T03:02:08Z","modified":"2023-02-02T05:06:48Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:52:22.708662Z"}],"nvd":[{"id":"CVE-2018-1000531","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","status":"published","published":"2018-06-26T16:29:01.807Z","modified":"2026-06-17T01:32:51.21Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:04:30.900603Z"}],"osv":[{"id":"CVE-2018-1000531","description":"inversoft prime-jwt version prior to commit abb0d479389a2509f939452a6767dc424bb5e6ba contains a CWE-20 vulnerability in JWTDecoder.decode that can result in an incorrect signature validation of a JWT token. This attack can be exploitable when an attacker crafts a JWT token with a valid header using 'none' as algorithm and a body to requests it be validated. This vulnerability was fixed after commit abb0d479389a2509f939452a6767dc424bb5e6ba.","status":"published","published":"2018-06-26T16:29:01.807Z","modified":"2026-10-24T10:47:37.011750554Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:07.192756Z"}]}}