{"id":"CVE-2025-21617","summary":"Guzzle OAuth Subscriber has insufficient nonce entropy","details":"Guzzle OAuth Subscriber signs Guzzle requests using OAuth 1.0. Prior to 0.8.1, Nonce generation does not use sufficient entropy nor a cryptographically secure pseudorandom source. This can leave servers vulnerable to replay attacks when TLS is not used. This vulnerability is fixed in 0.8.1.","aliases":["GHSA-237r-r8m4-4q88"],"modified":"2026-04-02T12:35:16.259895Z","published":"2025-01-06T19:23:23.232Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21617.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-338"]},"references":[{"type":"WEB","url":"https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192"},{"type":"WEB","url":"https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21617.json"},{"type":"ADVISORY","url":"https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21617"},{"type":"FIX","url":"https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/guzzle/oauth-subscriber","events":[{"introduced":"0"},{"fixed":"92b619b03bd21396e51c62e6bce83467d2ce8f53"}]},{"type":"GIT","repo":"https://github.com/guzzle/oauth-subscriber","events":[{"introduced":"0"},{"fixed":"92b619b03bd21396e51c62e6bce83467d2ce8f53"}]}],"versions":["0.1.0","0.1.1","0.1.2","0.2.0","0.3.0","0.4.0","0.5.0","0.6.0","0.7.0","0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21617.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}