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CVE-2025-31691 — Vulnerability in drupal/oauth2_server — CVE Details

HIGH

Drupal OAuth2 Server Missing Authorization vulnerability

Published April 1, 2025Updated December 10, 2025Source: osv

Summary

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

Advisory Timeline

  • First published April 1, 2025 (559 days ago).
  • Last revised December 10, 2025 — 254 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update drupal/oauth2_server to 2.1.0 or later
composer require "drupal/oauth2_server:^2.1.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: packagist (1).

PackageEcosystemAffectedFixed In
drupal/oauth2_server
packagist
All versions2.1.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-862
    Missing AuthorizationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2025-31691?
Drupal OAuth2 Server Missing Authorization vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2025-31691?
CVE-2025-31691 affects drupal/oauth2_server. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-31691 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-4f8q-mwgc-3mwc
DRUPAL-CONTRIB-2025-020

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More Packagist advisories

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