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TI-2026-16090 Aliases CVE-2026-19842GHSA-qj54-25r3-fmh2

SAML Single Sign On 4.8.85 - 5.4.6 - Unauthenticated Administrator Account Takeover via SAML Trust Anchor Overwrite

Priority MEDIUM 40CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.

Summary

The SAML Single Sign On WordPress plugin before 5.4.7 does not verify the signature of a SAML response before storing the certificate it carries, and offers an administrator a one-click control that promotes that stored certificate to the site's trusted signing certificate, allowing unauthenticated attackers to have a certificate of their own trusted and then authenticate as any user, including an administrator.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00291 21st percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed SAML Single Sign On (Unknown): 5.4.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownSAML Single Sign On4.8.85 to before 5.4.75.4.7Patch availableCNA
  • SAML Single Sign On VendorUnknown Affected 4.8.85 to before 5.4.7 Fixed in 5.4.7 Patch available CNA

Remediation

  • Fix · CNA SAML Single Sign On (Unknown) Fixed in 5.4.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19842
  2. 2026-10-03 Alias added: GHSA-qj54-25r3-fmh2

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences