What the vulnerability does
01Description
The Gutenberg Blocks, Page Builder – ComboBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the redirectURL parameter of the Date Countdown widget, in all versions up to, and including, 2.2.85 due to insufficient input sanitization and output escaping on user supplied attributes. 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
Post Grid versions up to 2.2.85 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts into the plugin's settings or content fields. These scripts execute in the browsers of other site users and administrators, potentially compromising accounts or stealing sensitive data. The vulnerability affects the entire site scope due to its stored nature.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers when they view affected pages or admin panels.
Potential impact on your site
04Site Impact
Attackers with basic user accounts can compromise admin sessions, steal credentials, or deface site content visible to all visitors.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account (e.g., contributor or subscriber role).
Key dates
06Disclosure timeline
August 1, 2024
CVE published
April 8, 2026
Record updated
