CVE-2025-21617

Summary

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.

Affected Software

Weaknesses

• CWE-338: CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88
• https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53
• https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192
• https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1

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