WordPress plugin
WP OAuth Server (OAuth Authentication) < 3.1.5 — Pseudorandom Number Generation
CVE-2015-9435Published · Updated Action summary
Affected: <3.1.5Update to 3.1.5 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WP OAuth Server (OAuth Authentication) oauth2-provider
- Affected< 3.1.5
- Patched in3.1.5
Update to 3.1.5 or newer.
You are affected if you run < 3.1.5. Version 3.1.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP OAuth Server (OAuth Authentication).
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.1.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WP OAuth Server (OAuth Authentication) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Mallory Adams.
The oauth2-provider plugin before 3.1.5 for WordPress has incorrect generation of random numbers.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in WP OAuth Server (OAuth Authentication)
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤4.5.1Update to 4.5.2 | CVE-2026-97288 | |
| Medium5.4 | Open Redirect ≤4.3.3Update to 4.4.0 | CVE-2024-31253 | |
| Medium4.3 | Authenticated (Subscriber+) Arbitrary Client Deletion (wo_ajax_remove_client) ≤4.2.5Update to 4.3.0 | CVE-2022-4148 | |
| Medium6.5 | Cross-Site Request Forgery to Arbitrary Post Deletion (wo_ajax_remove_client) ≤4.2.3Update to 4.2.5 | CVE-2022-3894 | |
| Medium5.4 | WP OAuth Server (OAuth Authentication) <= 4.2.5 -Cross-Site Request Forgery ≤4.2.5Update to 4.3.0 | — |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤4.5.1Update to 4.5.2
- Medium5.4Open Redirect
≤4.3.3Update to 4.4.0
- Medium4.3Authenticated (Subscriber+) Arbitrary Client Deletion (wo_ajax_remove_client)
≤4.2.5Update to 4.3.0
- Medium6.5Cross-Site Request Forgery to Arbitrary Post Deletion (wo_ajax_remove_client)
≤4.2.3Update to 4.2.5
- Medium5.4WP OAuth Server (OAuth Authentication) <= 4.2.5 -Cross-Site Request Forgery
≤4.2.5Update to 4.3.0
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.