Critical severity · published Oct 10, 2026
CVE-2026-66564
WordPress ShiftCV theme <= 3.0.14 - PHP Object Injection vulnerability
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Unauthenticated PHP Object Injection in ShiftCV <= 3.0.14 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 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SH
ShiftCV · ThemeREX
through 3.0.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66564
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66564
vdb-entry
https://patchstack.com/database/wordpress/theme/shift-cv/vulnerability/wordpress-shiftcv-theme-3-0-14-php-object-injection-vulnerability?_s_id=cve
More from ShiftCV
8.1
CVE-2026-28015
WordPress ShiftCV theme <= 3.0.14 - Local File Inclusion vulnerability