Critical severity · published Aug 13, 2026
CVE-2026-28148
WordPress Headless Single Sign On plugin <= 1.6 - Bypass Vulnerability vulnerability
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Unauthenticated Bypass Vulnerability in Headless Single Sign On <= 1.6 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
Headless Single Sign On · miniOrange
through 1.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28148
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28148
patchstack.com
https://patchstack.com/database/wordpress/plugin/headless-single-sign-on/vulnerability/wordpress-headless-single-sign-on-plugin-1-6-bypass-vulnerability-vulnerability?_s_id=cve
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