Vulnerability Description
Grav Shortcode Core Plugin allows for the development shortcode plugins that utilize the common format utilized by WordPress and BBCode. Prior to 6.2.2, Grav Shortcode Core passes shortcode syntax through Security::detectXss() because it contains no literal less-than character, then ColorShortcode.php and related attribute handlers concatenate an attacker-controlled parameter into HTML without encoding. An account with admin.pages permission can close the generated attribute and add an event handler, creating stored cross-site scripting that executes for visitors or administrators who view the page. This issue is fixed in version 6.2.2.
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav-plugin-shortcode-core/commit/2a55eac8a2cc7f6c2d4
- https://github.com/getgrav/grav-plugin-shortcode-core/releases/tag/6.2.2
- https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph
- https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph
FAQ
What is CVE-2026-64851?
CVE-2026-64851 is a documented vulnerability. Grav Shortcode Core Plugin allows for the development shortcode plugins that utilize the common format utilized by WordPress and BBCode. Prior to 6.2.2, Grav Shortcode Core passes shortcode syntax thr...
How severe is CVE-2026-64851?
CVSS scoring is not yet available for CVE-2026-64851. Check NVD for updates.
Is there a patch for CVE-2026-64851?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.