// For flags

CVE-2025-31691

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

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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

*Credits: Pierre Rudloff (prudloff), cafuego, Lee Rowlands (larowlan), Greg Knaddison (greggles)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2025-03-31 CVE Reserved
  • 2025-03-31 CVE Published
  • 2025-03-31 CVE Updated
  • 2025-04-01 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-862: Missing Authorization
CAPEC
  • CAPEC-87: Forceful Browsing
References (1)
URL Tag Source
https://www.drupal.org/sa-contrib-2025-020
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Drupal
Search vendor "Drupal"
 OAuth2 Server
Search vendor "Drupal" for product "OAuth2 Server"
 >= 0.0.0 < 2.1.0
Search vendor "Drupal" for product "OAuth2 Server" and version " >= 0.0.0 < 2.1.0"
en
Affected