Vulnerability-Lookup

CVE-2025-31691 (GCVE-0-2025-31691)

Vulnerability from cvelistv5 – Published: 2025-03-31 21:49 – Updated: 2025-04-29 15:20

Title

OAuth2 Server - Moderately critical - Access bypass - SA-CONTRIB-2025-020

Summary

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-01 18:23 UTC

CWE

CWE-862 - Missing Authorization

Assigner

drupal mitre root

References

1 reference

URL	Tags
https://www.drupal.org/sa-contrib-2025-020

Impacted products

1 product

Vendor	Product	Version	CPE status
Drupal	OAuth2 Server	Affected: 0.0.0 , < 2.1.0 (semver)	guessed

Date Public

2025-02-26 18:35

Credits

Pierre Rudloff (prudloff) cafuego Lee Rowlands (larowlan) Greg Knaddison (greggles)

Show details on NVD website

JSON

To clipboard

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    "dateReserved": "2025-03-31T21:30:15.360Z",
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    "state": "PUBLISHED"
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      "version": "3"
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FKIE_CVE-2025-31691

Vulnerability from fkie_nvd - Published: 2025-03-31 22:15 - Updated: 2026-06-17 09:10

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

References

	URL	Tags
	mlhess@drupal.org	https://www.drupal.org/sa-contrib-2025-020	Third Party Advisory

Impacted products

	Vendor	Product	Version
	oauth2_server_project	oauth2_server	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.drupal.org/project/oauth2_server",
          "defaultStatus": "unaffected",
          "product": "OAuth2 Server",
          "repo": "https://git.drupalcode.org/project/oauth2_server",
          "vendor": "Drupal",
          "versions": [
            {
              "lessThan": "2.1.0",
              "status": "affected",
              "version": "0.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "mlhess@drupal.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:oauth2_server_project:oauth2_server:*:*:*:*:*:drupal:*:*",
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              "versionEndExcluding": "2.1.0",
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0."
    },
    {
      "lang": "es",
      "value": "La vulnerabilidad de autorizaci\u00f3n faltante en Drupal OAuth2 Server permite la navegaci\u00f3n forzada. Este problema afecta al servidor OAuth2: desde la versi\u00f3n 0.0.0 hasta la 2.1.0."
    }
  ],
  "id": "CVE-2025-31691",
  "lastModified": "2026-06-17T09:10:47.133",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
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GHSA-4F8Q-MWGC-3MWC

Vulnerability from github – Published: 2025-04-01 00:30 – Updated: 2025-04-29 20:25

Summary

Drupal OAuth2 Server Missing Authorization vulnerability

Details

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing. This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "drupal/oauth2_server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-31691"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-02T17:13:34Z",
    "nvd_published_at": "2025-03-31T22:15:21Z",
    "severity": "HIGH"
  },
  "details": "Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing. This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.",
  "id": "GHSA-4f8q-mwgc-3mwc",
  "modified": "2025-04-29T20:25:20Z",
  "published": "2025-04-01T00:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-31691"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.drupalcode.org/project/oauth2_server"
    },
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2025-020"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Drupal OAuth2 Server Missing Authorization vulnerability"
}

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

CVE-2025-31691 (GCVE-0-2025-31691)

FKIE_CVE-2025-31691

GHSA-4F8Q-MWGC-3MWC

Tags

Sightings

Nomenclature

Related by attack behaviour