{"id":"CVE-2025-21617","aliases":["EUVD-2025-0003","GHSA-237r-r8m4-4q88"],"status":"published","title":"Guzzle OAuth Subscriber has insufficient nonce entropy","description":"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.","severity":{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00479,"percentile":0.41814,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-338"],"published":"2025-01-06T19:23:23Z","modified":"2026-10-28T02:30:26Z","fixes":[{"ecosystem":"Packagist","package":"guzzlehttp/oauth-subscriber","fixed_in":["0.8.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"guzzlehttp/oauth-subscriber","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"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"]}],"products":[{"vendor":"guzzle","product":"oauth-subscriber"}],"references":[{"url":"https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21617","tags":["advisory"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/oauth-subscriber/CVE-2025-21617.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-237r-r8m4-4q88"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21617.json","tags":["advisory"]},{"url":"https://github.com/guzzle/oauth-subscriber","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-21617","title":"Guzzle OAuth Subscriber has insufficient nonce entropy","description":"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.","status":"published","published":"2025-01-06T19:23:23.232Z","modified":"2025-01-06T19:42:17.597Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T14:32:32.702673Z"}],"euvd":[{"id":"EUVD-2025-0003","description":"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.","status":"published","published":"2025-01-06T19:23:23Z","modified":"2025-01-06T19:42:17Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-03T00:04:25.174818Z"}],"ghsa":[{"id":"GHSA-237r-r8m4-4q88","title":"Guzzle OAuth Subscriber has insufficient nonce entropy","description":"### 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.","status":"published","published":"2025-01-06T19:23:26Z","modified":"2026-07-15T21:57:56Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T14:40:43.958448Z"}],"nvd":[{"id":"CVE-2025-21617","description":"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.","status":"published","published":"2025-01-06T20:15:39.453Z","modified":"2026-06-17T08:43:51.967Z","cvss":[{"version":"4.0","score":6.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T14:10:48.373347Z"}],"osv":[{"id":"CVE-2025-21617","title":"Guzzle OAuth Subscriber has insufficient nonce entropy","description":"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.","status":"published","published":"2025-01-06T19:23:23.232Z","modified":"2026-10-28T02:30:26.083577388Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T15:44:46.665428Z"},{"id":"GHSA-237r-r8m4-4q88","title":"Guzzle OAuth Subscriber has insufficient nonce entropy","description":"### 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.","status":"published","published":"2025-01-06T19:23:26Z","modified":"2026-07-15T22:00:51.159337328Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T15:46:33.520522Z"}]}}