CVE-2025-28970 CRITICAL

CVE-2025-28970: WordPress WP Optimize By xTraffic plugin <= 5.1.6 - PHP Object Injection Vulnerability

Vendor Pep.vn
Product WP Optimize By xTraffic
Weakness CWE-502 · Unsafe deserialization
Published June 27, 2025
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in pep.vn WP Optimize By xTraffic wp-optimize-by-xtraffic allows Object Injection.This issue affects WP Optimize By xTraffic: from n/a through <= 5.1.6.

Explanation of Vulnerability in Simple Terms

02Summary

WP Optimize By xTraffic versions 5.1.6 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary PHP code on the site. The vulnerability requires no user interaction and can be exploited remotely over the network. All installations of this plugin should be updated immediately.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the site without authentication.

Potential impact on your site

04Site Impact

Complete compromise of the WordPress site, including data theft, malware installation, and site takeover.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 27, 2025 CVE published
April 28, 2026 Record updated