What the vulnerability does
01Description
The Link Whisper Free plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 0.7.1 via deserialization of untrusted input of the 'mfn-page-items' post meta value. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
Explanation of Vulnerability in Simple Terms
02Summary
Link Whisper Free versions 0.7.1 and earlier contain a deserialization vulnerability that allows authenticated attackers to execute arbitrary code on the site. The vulnerability stems from unsafe handling of serialized data, enabling an attacker with low-level access to inject malicious payloads. This affects confidentiality, integrity, and availability of the WordPress installation.
What an attacker can do
03Attacker Capabilities
Run arbitrary code on the site with the privileges of the WordPress user account.
Potential impact on your site
04Site Impact
A compromised user account can lead to full site takeover, data theft, or malware injection.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level WordPress user account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
April 9, 2024
CVE published
April 8, 2026
Record updated
