What the vulnerability does
01Description
The kk blog card plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'blog-card' shortcode in all versions up to, and including, 1.3. This is due to insufficient input sanitization and output escaping on the shortcode's 'href' and 'type' attributes, which are concatenated directly into HTML attribute contexts in the shortcode callback registered in kk-blog-card-shortcode.php. 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
KK Blog Card versions 1.3 and earlier contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts into blog card content. When other users view the affected content, the scripts execute in their browsers, potentially allowing the attacker to steal session tokens, modify page content, or perform actions on behalf of victims.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute when other users view blog card content.
Potential impact on your site
04Site Impact
Authenticated users can inject code affecting all site visitors; session hijacking and unauthorized actions possible.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
June 9, 2026
CVE published
June 9, 2026
Record updated
