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Vulnerabilities

Vulnerability · CVE-2025-9485

The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12.

Published Oct 4, 2025 · catalog updated Apr 8, 2026 · OAuth Single Sign On – SSO (OAuth Client)

Check this week

CVE-2025-9485 is not in CISA KEV. FIRST estimates a 60.00% chance of exploitation in the next 30 days. Check whether you run OAuth Single Sign On – SSO (OAuth Client).

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
60.00%
Remediation
Vendor / distro source
Affected products
vendor cyberlord92 OAuth Single Sign On – SSO (OAuth Client) 0 ≤6.26.12

The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the function. This makes it possible for unauthenticated attackers to bypass authentication and gain access to any existing user account - including administrators in certain configurations - or to create arbitrary subscriber-level accounts.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor cyberlord92 OAuth Single Sign On – SSO (OAuth Client) 0 ≤6.26.120 ≤6.26.12

How to fix CVE-2025-9485

  • Recommended remediation

    A vendor or distribution source is linked. Check that advisory for patch availability; this catalog does not invent fix status.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-9485 is not in CISA KEV. FIRST estimates a 60.00% chance of exploitation in the next 30 days. Check whether you run OAuth Single Sign On – SSO (OAuth Client).

Which versions are affected?

Compare what you have installed with cyberlord92 OAuth Single Sign On – SSO (OAuth Client) 0 ≤6.26.12 0 ≤6.26.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 60.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 4, 2025 · EUVD

    Detected

    The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the function. This makes it possible for unauthenticated attackers to bypass authentication and gain access to any existi

  2. Apr 8, 2026 · EUVD

    Updated

    The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the function. This makes it possible for unauthenticated attackers to bypass authentication and gain access to any existi

Sources

  • EUVDVulnerability recordEUVD-2025-32415

    The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in t

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Apr 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.