What the vulnerability does
01Description
The DeMomentSomTres Shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'callout' shortcode in all versions up to, and including, 1.1.1. This is due to insufficient input sanitization and output escaping on the 'width' and 'align' shortcode attributes within the st_callout() function, which concatenates the attribute values directly into an HTML style attribute. 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
DeMomentSomTres Shortcodes versions 1.1.1 and earlier contain a cross-site scripting (XSS) vulnerability in shortcode processing. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has scope change, meaning the impact extends beyond the vulnerable component itself.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, potentially stealing session tokens or performing actions as those users.
Potential impact on your site
04Site Impact
Any authenticated user can inject scripts affecting other users and admins; compromised admin sessions could lead to full site takeover.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
June 2, 2026
CVE published
June 2, 2026
Record updated
