What the vulnerability does
01Description
The Developer Formatter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Custom CSS in all versions up to, and including, 2015.0.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
Developer Formatter versions up to 2015.0.2.1 contain a cross-site scripting vulnerability that allows high-privilege users to inject malicious scripts affecting other users across the application. The vulnerability requires administrative or elevated account access to exploit. The impact is limited to low-level data exposure and modification, with no availability impact.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect application data.
Potential impact on your site
04Site Impact
High-privilege accounts can be abused to inject scripts affecting other users; requires immediate credential review and patching.
Conditions required to exploit
05Prerequisites
Attacker must have high-level privileges (admin or equivalent account) and network access to the application.
Key dates
06Disclosure timeline
June 6, 2025
CVE published
April 8, 2026
Record updated
