Critical severity · published Oct 5, 2026
CVE-2026-97283
WordPress Advanced Post Manager plugin <= 4.5.5 - PHP Object Injection vulnerability
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP Advanced Post Manager advanced-post-manager allows Object Injection.This issue affects Advanced Post Manager: from n/a through 4.5.5.
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
AP
Advanced Post Manager · Liquid Web / StellarWP
through 4.5.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-97283
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-97283
vdb-entry
https://patchstack.com/database/wordpress/plugin/advanced-post-manager/vulnerability/wordpress-advanced-post-manager-plugin-4-5-5-php-object-injection-vulnerability?_s_id=cve
More from Advanced Post Manager
7.1
CVE-2026-111396
WordPress Advanced Post Manager plugin <= 4.5.6 - Broken Access Control vulnerability