plugin

Headless Single Sign On Vulnerabilities

1 known security issue reported for the Headless Single Sign On WordPress plugin. Most recent disclosed Aug 12, 2026.

1 high

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Headless Single Sign On <= 1.6 - Unauthenticated PHP Object Injection

high

The Headless Single Sign On plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.6 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is pr...

CVSS:: 8.1
Affected:: up to 1.6
Fixed in:: 1.6.1
Disclosed:: Aug 12, 2026

CVE-2026-28149 on NVD →

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