CVE-2026-28149CWE-502insecure-deserialization

CVE-2026-28149

Critical · published August 13, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
46.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00564 · 46.1th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-08-13T18:16Z
References (1)
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 · [email protected]
EPSS history
Timeline
  • 13 AUG 13:36Z
    WordPress Headless Single Sign On plugin <= 1.6 - PHP Object Injection vulnerability
    cvelistv5