What the vulnerability does
01Description
The Schema Scalpel plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post title in all versions up to, and including, 1.6.1 due to insufficient input sanitization and output escaping when outputting user-supplied data into JSON-LD schema markup. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
Schema Scalpel versions 1.6.1 and earlier contain a stored cross-site scripting (XSS) vulnerability. An attacker with low-level user privileges can inject malicious scripts that execute in the browsers of other users viewing affected content. The vulnerability affects the application's scope, potentially impacting multiple components or users.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view affected content.
Potential impact on your site
04Site Impact
Users' browsers can execute attacker-controlled scripts, risking session hijacking, credential theft, or malware distribution.
Conditions required to exploit
05Prerequisites
Attacker must have low-level user account access to the application.
Key dates
06Disclosure timeline
November 1, 2025
CVE published
April 8, 2026
Record updated
