CVE-2025-31691

CRITICAL
2025-03-31 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:34 vuln.today
CVE Published
Mar 31, 2025 - 22:15 nvd
CRITICAL 9.8

Tags

Authentication Bypass Oauth2 Server Drupal

Description

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

Analysis

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.0.0 before 2.1.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.0.0 before 2.1.0. Affected products include: Oauth2 Server Project Oauth2 Server. Version information: before 2.1.0..

Affected Products

Oauth2 Server Project Oauth2 Server.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.4
CVSS: +49
POC: 0

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CVE-2025-31691 vulnerability details – vuln.today
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