Base Score

CRITICAL9.8

CVE-2025-31691

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

VectorNETWORK

Published Bymlhess@drupal.org

Published DateMar 31, 2025, 22:15

Affected Versions(1)

drupal/oauth2_server(Packagist)

Introduced0

Fixed2.1.0

LimitN/A

Package (Ecosystem)	Introduced	Fixed	Limit
drupal/oauth2_server(Packagist)	0	2.1.0	N/A

Weakness Type (CWE):CWE-862

CVSS Metrics

Base Score

9.8

Vector String

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

Base Severity

CRITICAL

Version

3.1

Attack Vector (AV)

NETWORK

Attack Complexity (AC)

LOW

Privileges Required (PR)

NONE

User Interaction (UI)

NONE

Scope (S)

UNCHANGED

Confidentiality (C)

HIGH

Integrity (I)

HIGH

Availability (A)

HIGH

References

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

Base Score

CRITICAL9.8

Weakness Type (CWE):CWE-862

CVSS Metrics

Base Score

9.8

Vector String

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

Base Severity

CRITICAL

Version

3.1

Attack Vector (AV)

NETWORK

Attack Complexity (AC)

LOW

Privileges Required (PR)

NONE

User Interaction (UI)

NONE

Scope (S)

UNCHANGED

Confidentiality (C)

HIGH

Integrity (I)

HIGH

Availability (A)

HIGH