WP OAuth Server <= 4.2.5 — Authenticated (Subscriber+) Arbitrary Client Deletion (wo_ajax_remove_client)
CVE-2022-4148Published · Updated Action summary
Affected: ≤4.2.5Update to 4.3.0 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-863 Incorrect Authorization
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WP OAuth Server (OAuth Authentication) oauth2-provider
- Affected≤ 4.2.5
- Patched in4.3.0
Update to 4.3.0 or newer.
You are affected if you run ≤ 4.2.5. Version 4.3.0 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.
What to do
- Update to version 4.3.0, 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 István Márton.
The WP OAuth Server plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the wo_ajax_remove_client() function in versions up to, and including, 4.2.5. This makes it possible for authenticated attackers with minimal permissions such as a subscriber to delete arbitrary clients.
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 | |
| 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 | — | |
| High8.8 | Cross-Site Request Forgery ≤4.2.5Update to 4.3.0 | CVE-2022-3926 |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤4.5.1Update to 4.5.2
- Medium5.4Open Redirect
≤4.3.3Update to 4.4.0
- 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
- High8.8Cross-Site Request Forgery
≤4.2.5Update to 4.3.0
Timeline
CVE published
Severity medium, CVSS 4.3
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.