Vulnerability-Lookup

GHSA-237R-R8M4-4Q88

Vulnerability from github – Published: 2025-01-06 19:23 – Updated: 2026-07-15 21:57

Summary

Guzzle OAuth Subscriber has insufficient nonce entropy

Details

Impact

Nonce generation does not use sufficient entropy nor a cryptographically secure pseudorandom source (https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192). This can leave servers vulnerable to replay attacks when TLS is not used.

Patches

Upgrade to version 0.8.1 or higher.

Workarounds

No.

References

Issue is similar to https://nvd.nist.gov/vuln/detail/CVE-2025-22376.

Severity

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "guzzlehttp/oauth-subscriber"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-21617"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-01-06T19:23:26Z",
    "nvd_published_at": "2025-01-06T20:15:39Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nNonce generation does not use sufficient entropy nor a cryptographically secure pseudorandom source (https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192). This can leave servers vulnerable to replay attacks when TLS is not used.\n\n### Patches\n\nUpgrade to version 0.8.1 or higher.\n\n### Workarounds\n\nNo.\n\n### References\n\nIssue is similar to https://nvd.nist.gov/vuln/detail/CVE-2025-22376.",
  "id": "GHSA-237r-r8m4-4q88",
  "modified": "2026-07-15T21:57:55Z",
  "published": "2025-01-06T19:23:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21617"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/oauth-subscriber/CVE-2025-21617.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/guzzle/oauth-subscriber"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Guzzle OAuth Subscriber has insufficient nonce entropy"
}

CVE-2025-21617 (GCVE-0-2025-21617)

Vulnerability from cvelistv5 – Published: 2025-01-06 19:23 – Updated: 2025-01-06 19:42

Title

Guzzle OAuth Subscriber has insufficient nonce entropy

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.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-01-06 19:42 UTC

CWE

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

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/guzzle/oauth-subscriber/securi…	x_refsource_CONFIRM
https://github.com/guzzle/oauth-subscriber/commit…	x_refsource_MISC
https://github.com/guzzle/oauth-subscriber/blob/0…	x_refsource_MISC
https://github.com/guzzle/oauth-subscriber/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
guzzle	oauth-subscriber	Affected: < 0.8.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-21617",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-06T19:42:11.083971Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-01-06T19:42:17.597Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "oauth-subscriber",
          "vendor": "guzzle",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.8.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-338",
              "description": "CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-06T19:23:23.232Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/guzzle/oauth-subscriber/security/advisories/GHSA-237r-r8m4-4q88"
        },
        {
          "name": "https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/oauth-subscriber/commit/92b619b03bd21396e51c62e6bce83467d2ce8f53"
        },
        {
          "name": "https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/oauth-subscriber/blob/0.8.0/src/Oauth1.php#L192"
        },
        {
          "name": "https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/oauth-subscriber/releases/tag/0.8.1"
        }
      ],
      "source": {
        "advisory": "GHSA-237r-r8m4-4q88",
        "discovery": "UNKNOWN"
      },
      "title": "Guzzle OAuth Subscriber has insufficient nonce entropy"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-21617",
    "datePublished": "2025-01-06T19:23:23.232Z",
    "dateReserved": "2024-12-29T03:00:24.713Z",
    "dateUpdated": "2025-01-06T19:42:17.597Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-237R-R8M4-4Q88

Impact

Patches

Workarounds

References

CVE-2025-21617 (GCVE-0-2025-21617)

Tags

Sightings

Nomenclature

Related by attack behaviour