What the vulnerability does
01Description
The Multi Post Carousel by Category plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'slides' shortcode attribute in all versions up to, and including, 1.4. This is due to insufficient input sanitization and output escaping on the user-supplied 'slides' parameter in the post_slides_shortcode function. 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
Multi Post Carousel by Category versions 1.4 and earlier contain a cross-site scripting vulnerability. An attacker with low-level site access can inject malicious scripts that execute in other users' browsers, potentially stealing session tokens or modifying page content. The vulnerability affects the plugin's carousel rendering and impacts all site visitors.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers to steal credentials or modify page content.
Potential impact on your site
04Site Impact
Visitors and admins may have their sessions hijacked or see malicious content injected into carousel displays.
Conditions required to exploit
05Prerequisites
Attacker needs a low-privilege account (e.g., contributor or subscriber role) on the WordPress site.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
