High severity · published Aug 20, 2026
CVE-2026-66594
WordPress WordPress Persistent Login plugin <= 3.1.0 - SQL Injection vulnerability
8.5
CVSS
0.4%
EPSS
No
On KEV
Description
Subscriber SQL Injection in WordPress Persistent Login <= 3.1.0 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WP
WordPress Persistent Login · lukeseager
through 3.1.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66594
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66594
patchstack.com
https://patchstack.com/database/wordpress/plugin/wp-persistent-login/vulnerability/wordpress-wordpress-persistent-login-plugin-3-1-0-sql-injection-vulnerability?_s_id=cve
More from WordPress Persistent Login
7.1
CVE-2026-94081
WordPress WordPress Persistent Login plugin <= 3.1.3 - Cross Site Scripting (XSS) vulnerability