What the vulnerability does
01Description
The Editorial Rating – Product Review & Rating System plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'Link URL' Field in all versions up to, and including, 4.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The WordPress unfiltered_html capability exemption does not apply here because the payload is stored in post meta (_wpas_er_options via update_post_meta) rather than in post_content or post_excerpt, meaning the restriction affects all administrators regardless of their unfiltered_html status.
Explanation of Vulnerability in Simple Terms
02Summary
Editorial Rating contains a cross-site scripting (XSS) vulnerability in versions up to 4.0.5. An authenticated administrator with high privileges can inject malicious scripts that affect other users or the site scope. The vulnerability requires high attack complexity and does not require user interaction from the victim. Low confidentiality and integrity impact.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers or affect site functionality.
Potential impact on your site
04Site Impact
An admin account compromise could allow script injection affecting site visitors or other administrators.
Conditions required to exploit
05Prerequisites
Attacker must be an authenticated administrator or high-privilege user with network access.
Key dates
06Disclosure timeline
June 30, 2026
CVE published
