CVE-2026-65577 CRITICAL

CVE-2026-65577: WordPress Advice theme <= 1.18.0 - PHP Object Injection vulnerability

Vendor Ancorathemes

Product Advice

Weakness CWE-502 · Unsafe deserialization

Published August 6, 2026

Last update August 6, 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

Unauthenticated PHP Object Injection in Advice <= 1.18.0 versions.

Explanation of Vulnerability in Simple Terms

02Summary

AncoraThemes Advice versions up to 1.18.0 contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on the site without user interaction. The vulnerability stems from unsafe handling of serialized data, enabling remote code execution through network requests. Site administrators should update immediately to a version newer than 1.18.0.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site and take complete control of it.

Potential impact on your site

04Site Impact

Complete site compromise: attackers can steal data, modify content, install malware, or take the site offline.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

August 6, 2026 CVE published

August 6, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-65577 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

Related vulnerabilities