WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) <= 44.1 — Unauthenticated Authentication Bypass via OIDC Nonce Replay via id_token Nonce Verification
CVE-2026-104759Published · Updated Action summary
Affected: ≤44.1Update to 45.0 or newer
All remediation steps- Severity
- High8.1
- CVSS
- 8.1CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:HAttack complexity- High
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-287 Improper Authentication
- Required access
- No account needed
- Exploit prediction (EPSS)
- 0.5% chance in 30 days44th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) wpo365-login
- Affected≤ 44.1
- Patched in45.0
Update to 45.0 or newer.
You are affected if you run ≤ 44.1. Version 45.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN).
- 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 45.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Wordfence PRISM.
The WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin for WordPress is vulnerable to Authentication Bypass via OIDC Nonce Replay in all versions up to, and including, 44.1 This is due to `Id_Token_Service_Deprecated::process_openidconnect_token()` using the incompatible WordPress core `wp_verify_nonce()` function to validate a nonce produced by `Nonce_Service::create_nonce()` — a 64-character hex value that `wp_verify_nonce()` can never successfully verify — causing the nonce check to silently fail without terminating authentication, so execution continues into `authenticate_oidc_user()` with the attacker-supplied `id_token`. This makes it possible for unauthenticated attackers who have obtained a previously-issued, valid `id_token` for a target account to replay that token and authenticate as any WordPress user, including administrators, resulting in full site takeover. This vulnerability is only exploitable when the `use_id_token_parser_v2` plugin option is enabled, as this is the configuration that routes token processing through the deprecated parser containing the broken nonce check.
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 WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.3 | Authentication Bypass via SAML Relay ≤45.1Update to 45.2 | CVE-2026-122220 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via 'id_token' Parameter (iss / unique_name JWT claims) ≤44.1Update to 45.0 | CVE-2026-96765 | |
| Medium4.3 | Missing Authorization ≤44.1Update to 45.0 | CVE-2026-102915 | |
| High8.8 | Cross-Site Request Forgery to Privilege Escalation via Plugin Settings Update ≤43.2Update to 43.3 | CVE-2026-15212 | |
| Medium6.4 | Authenticated (Subscriber+) Server-Side Request Forgery ≤40.0Update to 40.1 | CVE-2025-67961 |
- Medium6.3Authentication Bypass via SAML Relay
≤45.1Update to 45.2
- High7.2Unauthenticated Stored Cross-Site Scripting via 'id_token' Parameter (iss / unique_name JWT claims)
≤44.1Update to 45.0
- Medium4.3Missing Authorization
≤44.1Update to 45.0
- High8.8Cross-Site Request Forgery to Privilege Escalation via Plugin Settings Update
≤43.2Update to 43.3
- Medium6.4Authenticated (Subscriber+) Server-Side Request Forgery
≤40.0Update to 40.1
Timeline
CVE published
Severity high, CVSS 8.1
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.