OAuth Server <= 6.3.0 — Authenticated (Subscriber+) Arbitrary User Identity Token Issuance to Privilege Escalation
CVE-2026-82843Published · Updated Action summary
Affected: ≤6.3.0Update to 6.4.0 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-287 Improper Authentication
- Required access
- Unknown
- Exploit prediction (EPSS)
- 0.2% chance in 30 days8th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
WP OAuth Server ( Login with WordPress ) miniorange-oauth-20-server
- Affected≤ 6.3.0
- Patched in6.4.0
Update to 6.4.0 or newer.
You are affected if you run ≤ 6.3.0. Version 6.4.0 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 ( Login with WordPress ).
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 6.4.0, 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 ( Login with WordPress ) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to vuxvinh.
The WP OAuth Server ( Login with WordPress ) plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 6.3.0. This makes it possible for authenticated attackers, with Subscriber-level access and above, to log in as other users without a password, including administrators.
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 ( Login with WordPress )
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Missing Authorization ≤6.4.0Update to 6.5.0 | CVE-2026-107433 | |
| Medium5.3 | Unauthenticated Information Exposure <6.3.1Update to 6.3.1 | CVE-2026-19715 | |
| High7.5 | Unauthenticated SQL Injection ≤6.2.0Update to 6.2.1 | CVE-2026-65520 | |
| Critical9.8 | Authentication Bypass ≤3.0.4Update to 4.0.1 | CVE-2022-34149 |
- Medium5.3Missing Authorization
≤6.4.0Update to 6.5.0
- Medium5.3Unauthenticated Information Exposure
<6.3.1Update to 6.3.1
- High7.5Unauthenticated SQL Injection
≤6.2.0Update to 6.2.1
- Critical9.8Authentication Bypass
≤3.0.4Update to 4.0.1
Timeline
CVE published
Severity high, CVSS 8.8
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.
- EPSS
- Exploit Prediction Scoring System by FIRST.org.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.