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CVE-2025-21617

Date: January 6, 2025

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 Score

Related Resources (7)

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
https://nvd.nist.gov/vuln/detail/CVE-2025-21617
https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88
https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1
https://www.mend.io/vulnerability-database/CVE-2025-21617

Severity Score

Weakness Type (CWE)

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

CWE-338

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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