CVE-2026-64628
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Jul 21, 2026
Vendor
unknown
Description
Grav contains a stored cross-site scripting vulnerability in shortcode-core attribute handlers where the XSS detection scan only matches payloads containing literal angle brackets, allowing shortcode parameters to bypass validation. Attackers with admin.pages permission can inject malicious JavaScript through shortcode attributes that execute in any viewer's browser, including administrators, enabling session hijacking via admin nonce theft.