WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) <= 45.1 — Authentication Bypass via SAML Relay
CVE-2026-122220Published · Updated Action summary
Affected: ≤45.1Update to 45.2 or newer
All remediation steps- Severity
- Medium6.3
- CVSS
- 6.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:LAvailability- Low
NVD scores this 9.1 (NVD).
- Required access
- Unknown
- Exploit prediction (EPSS)
- 0.3% chance in 30 days26th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) wpo365-login
- Affected≤ 45.1
- Patched in45.2
Update to 45.2 or newer.
You are affected if you run ≤ 45.1. Version 45.2 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.
What to do
- Update to version 45.2, 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 buiih.
The WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 45.1. This is due to a logic error in Saml2_Service::check_message_id() that returned before persisting processed SAML message IDs to the wpo365_saml_message_ids transient, rendering the anti-replay check non-functional. This makes it possible for unauthenticated attackers to replay a captured, validly-signed SAMLResponse to the ACS endpoint and authenticate as any victim user, including administrators, within the assertion's validity window. SAML 2.0 single sign-on must be enabled and the attacker must be able to capture a legitimately-signed SAMLResponse for the target user.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisoryplugins.trac.wordpress.org
- Advisorywordpress.org
- Advisoryvulncheck.com
- Advisorywordfence.com
Related CVEs
More in WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via 'id_token' Parameter (iss / unique_name JWT claims) ≤44.1Update to 45.0 | CVE-2026-96765 | |
| High8.1 | Unauthenticated Authentication Bypass via OIDC Nonce Replay via id_token Nonce Verification ≤44.1Update to 45.0 | CVE-2026-104759 | |
| 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 |
- High7.2Unauthenticated Stored Cross-Site Scripting via 'id_token' Parameter (iss / unique_name JWT claims)
≤44.1Update to 45.0
- High8.1Unauthenticated Authentication Bypass via OIDC Nonce Replay via id_token Nonce Verification
≤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 medium, CVSS 6.3
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.
- EPSS
- Exploit Prediction Scoring System by FIRST.org.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.