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CVE-2025-31691

Oauth2 Server Project Oauth2 Server broken access control

9.8 CRITICALEPSS 0.43%
  1. Published31 Mar 2025

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Oauth2 Server Project Oauth2 Server< 2.1.0

Remediation

Fixed in
Oauth2 Server Project Oauth2 Server≥ 2.1.0

References

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Frequently asked

Is CVE-2025-31691 being actively exploited?

CVE-2025-31691 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.43%.

How severe is CVE-2025-31691?

CVE-2025-31691 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.43% probability of exploitation.

Which products are affected by CVE-2025-31691?

Affected products include Oauth2 Server Project Oauth2 Server.

How do I fix CVE-2025-31691?

Upgrade affected software to a fixed version, for example Oauth2 Server Project Oauth2 Server 2.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-31691 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.