CVE-2025-21617 Information

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.

Reference

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