{"id":"GHSA-237r-r8m4-4q88","summary":"Guzzle OAuth Subscriber has insufficient nonce entropy","details":"### Impact\n\nNonce generation does not use sufficient entropy nor a cryptographically secure pseudorandom source (https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192). This can leave servers vulnerable to replay attacks when TLS is not used.\n\n### Patches\n\nUpgrade to version 0.8.1 or higher.\n\n### Workarounds\n\nNo.\n\n### References\n\nIssue is similar to https://nvd.nist.gov/vuln/detail/CVE-2025-22376.","aliases":["CVE-2025-21617"],"modified":"2026-07-15T22:00:51.159337328Z","published":"2025-01-06T19:23:26Z","database_specific":{"github_reviewed_at":"2025-01-06T19:23:26Z","nvd_published_at":"2025-01-06T20:15:39Z","cwe_ids":["CWE-338"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/oauth-subscriber/CVE-2025-21617.yaml"},{"type":"PACKAGE","url":"https://github.com/guzzle/oauth-subscriber"},{"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"}],"affected":[{"package":{"name":"guzzlehttp/oauth-subscriber","ecosystem":"Packagist","purl":"pkg:composer/guzzlehttp/oauth-subscriber"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.1"}]}],"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://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-237r-r8m4-4q88/GHSA-237r-r8m4-4q88.json"}}],"schema_version":"1.9.0","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"}]}