Administrator takeover via SAML trust-anchor overwrite
Published Aug 19, 2026 · Updated Aug 19, 2026
Improper authentication in miniOrange SAML Single Sign On – SSO Login before 5.4.7 allows remote attackers to gain administrator access. The response handler stores an X.509 certificate from an unverified SAML response, and a one-click control can replace the trusted signing certificate with it. Exploitation requires an administrator to activate the stored certificate; afterward, the attacker can authenticate as any WordPress user, including an administrator.
Summary
What happened
Improper authentication in miniOrange SAML Single Sign On – SSO Login before 5.4.7 allows remote attackers to gain administrator access. The response handler stores an X.509 certificate from an unverified SAML response, and a one-click control can replace the trusted signing certificate with it. Exploitation requires an administrator to activate the stored certificate; afterward, the attacker can authenticate as any WordPress user, including an administrator.
The record
- CVE
- CVE-2026-19842
- Published
- Aug 19, 2026
- Updated
- Aug 19, 2026
- Vendor
- miniOrange
- Product
- SAML Single Sign On – SSO Login
- Classifications
- CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 19, 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=4.8.85 <5.4.7
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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