Critical severity · published Oct 28, 2026
CVE-2026-115968
WordPress Ultimate Member plugin <= 2.13.1 - PHP Object Injection vulnerability
New
9.8
CVSS
–
EPSS
No
On KEV
Description
Deserialization of Untrusted Data vulnerability in Ultimate Member Ultimate Member ultimate-member allows Object Injection.This issue affects Ultimate Member: from n/a through 2.13.1.
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
UM
Ultimate Member · Ultimate Member
through 2.13.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115968
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115968
vdb-entry
https://patchstack.com/database/wordpress/plugin/ultimate-member/vulnerability/wordpress-ultimate-member-plugin-2-13-1-php-object-injection-vulnerability?_s_id=cve
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