CVSS 4.0
6.3 mediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NCVE-2025-21617
Medium (6.3). EPSS 0.5% chance of exploitation in the next 30 days.
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
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-11-01)
- CWE
- CWE-338
- Published
- Modified
- Record from
- the NVD, synced
References
- https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192
- https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53
- https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1
- https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88