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Not in CISA KEV
MEDIUM severity

CVE-2025-31684 — oauth2_client

MEDIUM

CVE-2025-31684 is a medium-severity (CVSS 6.8) Cross-Site Request Forgery (CSRF) vulnerability in drupal/oauth2_client. A fix is available for drupal/oauth2_client — see the affected versions and patch details below.

OAuth2 Client - Moderately critical - Cross Site Request Forgery - SA-CONTRIB-2025-013

Also known asDRUPAL-CONTRIB-2025-013GHSA-6chf-hhqf-749c
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-31684.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs8th percentile — riskier than 8% of all scored CVEsHighest risk
0.00%0.27%0.53%0.80%0.2%0.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘drupal/oauth2_client

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Cross-Site Request Forgery (CSRF) vulnerability in Drupal OAuth2 Client allows Cross Site Request Forgery. This issue affects OAuth2 Client: from 0.0.0 before 4.1.3.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistdrupal/oauth2_clientall versions4.1.3composer require drupal/oauth2_client:^4.1.3

Affected Products

1 product · 1 configurations
Application
oauth2 clientmskcc
< 4.1.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/oauth2_client, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update drupal/oauth2_client to 4.1.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-31684 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Cross-Site Request Forgery (CSRF) vulnerability in Drupal OAuth2 Client allows Cross Site Request Forgery. This issue affects OAuth2 Client: from 0.0.0 before 4.1.3.
O3 Security · Impact-Aware SCA

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CVE-2025-31684: oauth2_client CSRF — Fixed in 4.1.3