CVE-2026-28149

CRITICAL 9.8

WordPress Headless Single Sign On plugin <= 1.6 - PHP Object Injection vulnerability

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.

CWE	CWE-502
Vendor	miniorange
Product	headless single sign on
Published	Aug 13, 2026

Stay Ahead of the Next One

Get instant alerts for miniorange headless single sign on

Be the first to know when new critical vulnerabilities affecting miniorange headless single sign on are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

miniOrange / Headless Single Sign On

n/a ≤ 1.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/wordpress/plugin/headless-single-sign-on/vulnerability/wordpress-headless-single-sign-on-plugin-1-6-php-object-injection-vulnerability?_s_id=cve

Credits

Asim Alshaya | Patchstack Bug Bounty Program