CVE-2025-26999 HIGH

CVE-2025-26999: WordPress ProfileGrid Plugin <= 5.9.4.3 - PHP Object Injection vulnerability

Vendor Metagauss

Product ProfileGrid

Weakness CWE-502 · Unsafe deserialization

Published March 3, 2025

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

8.8/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in Metagauss ProfileGrid profilegrid-user-profiles-groups-and-communities allows Object Injection.This issue affects ProfileGrid : from n/a through <= 5.9.4.3.

Explanation of Vulnerability in Simple Terms

02Summary

ProfileGrid versions up to 5.9.4.3 contain a deserialization vulnerability that allows authenticated users to execute arbitrary code on the site. An attacker with low-level access can craft malicious serialized data to trigger code execution with full site privileges. This affects confidentiality, integrity, and availability of the entire installation.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site with full administrative privileges.

Potential impact on your site

04Site Impact

Complete site compromise: data theft, malware injection, user account takeover, and service disruption.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account (e.g., subscriber or contributor role).

Key dates

06Disclosure timeline

March 3, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-26999 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

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