Critical severity · published Oct 29, 2026
CVE-2026-54857
WordPress Quirky theme <= 1.23 - PHP Object Injection vulnerability
New
9.8
CVSS
–
EPSS
No
On KEV
Description
Unauthenticated PHP Object Injection in Quirky <= 1.23 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?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QU
Quirky · ThemeREX
through 1.23 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54857
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54857
vdb-entry
https://patchstack.com/database/wordpress/theme/quirky/vulnerability/wordpress-quirky-theme-1-23-php-object-injection-vulnerability?_s_id=cve
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