Vulnerability details

CVE-2026-115968

ultimatemember Ultimate Member

WordPress Ultimate Member plugin <= 2.13.1 - PHP Object Injection vulnerability

CVSS 3.1

9.8Critical

Official 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 scores

Score	Version	Source	Vector
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (Patchstack)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
ultimatemember	Ultimate Member	v ≤ 2.13.1	CVEProject cvelistV5 (CNA)

References and advisories

https://patchstack.com/database/wordpress/plugin/ultimate-member/vulnerability/wordpress-ultimate-member-plugin-2-13-1-php-object-injection-vulnerability?_s_id=cve vdb-entry

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Details

Published: 2026-10-28
Last updated: 2026-10-28
State: Published
Assigner (CNA): Patchstack
Kolun priority: 24 · Low

Exploit prediction (EPSS)

0.4%

Probability of exploitation in 30 days

35.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-502
Deserialization of Untrusted Data