Unauthenticated account takeover via unsigned identity tokens
Published Mar 3, 2026 · Updated Mar 3, 2026
Authentication bypass in SSO Login 2.2.5 and earlier allows remote attackers to access arbitrary WordPress accounts, including administrators. The OIDC callback accepts an inbound id_token without verifying its signature against Microsoft's JWKS keys, then trusts attacker-controlled identity claims. A publicly reachable callback, any nonempty code value, the discoverable state value, and a target username are enough to create a WordPress session as that user.
Summary
What happened
Authentication bypass in SSO Login 2.2.5 and earlier allows remote attackers to access arbitrary WordPress accounts, including administrators. The OIDC callback accepts an inbound id_token without verifying its signature against Microsoft's JWKS keys, then trusts attacker-controlled identity claims. A publicly reachable callback, any nonempty code value, the discoverable state value, and a target username are enough to create a WordPress session as that user.
The record
- CVE
- CVE-2026-2628
- Published
- Mar 3, 2026
- Updated
- Mar 3, 2026
- Vendor
- miniOrange
- Product
- All-in-One Microsoft 365 & Entra ID / Azure AD SSO Login
- Classifications
- CWE-288, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 3, 2026CVE publishedPublication date reported by the CVE source.
- Mar 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=* <=2.2.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- YesWeHack forged id_token proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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