CVE-2025-21617

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.
PRNG
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
UNKNOWN
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GitHub_MCNA
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CISA-ADPADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 29%
Common Weakness Enumeration
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