Vulnerability · Published Mar 31, 2025 · Assigned by drupal
CVE-2025-31691OAuth2 Server - Moderately critical - Access bypass - SA-CONTRIB-2025-020
Critical 9.8
In plain English
A critical-severity missing authorization in OAuth2 Server from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 62.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | drupal/oauth2_server | 2.1.0 | GHSA-4f8q-mwgc-3mwc |
| Packagist:https://packages.drupal.org/8 | drupal/oauth2_server | 2.1.0 | DRUPAL-CONTRIB-2025-020 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | OAuth2 Server | 0.0.0 – before 2.1.0 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H