CVE-2026-25359 HIGH

CVE-2026-25359: WordPress Pendulum theme < 3.1.5 - PHP Object Injection vulnerability

Vendor Rascals

Product Pendulum

Weakness CWE-502 · Unsafe deserialization

Published March 25, 2026

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 rascals Pendulum pendulum allows Object Injection.This issue affects Pendulum: from n/a through < 3.1.5.

Explanation of Vulnerability in Simple Terms

02Summary

Pendulum versions 3.1.5 and earlier contain a deserialization vulnerability that allows an authenticated attacker to execute arbitrary code on the server. The vulnerability exists because the application deserializes untrusted data without proper validation. An attacker with low-level access can craft malicious serialized objects to achieve remote code execution with full system privileges.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server with full system access (read, modify, delete files and data).

Potential impact on your site

04Site Impact

Complete compromise of the Pendulum installation and underlying server; attacker can steal data, modify content, or use the server for further attacks.

Conditions required to exploit

05Prerequisites

Attacker must have a valid user account with low-level privileges; no user interaction required.

Key dates

06Disclosure timeline

March 25, 2026 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-25359 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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