High 8.5Published Aug 19, 2026

CVE-2026-64851Grav Shortcode Core Plugin: Stored XSS in shortcode-core attribute handlers

Updated under an hour ago (2026-10-19 07:30 UTC)

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It affects getgrav grav-plugin-shortcode-core. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for getgrav grav-plugin-shortcode-core

Exploited in the last 30 days

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.

CVSS: 8.5 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

getgrav grav-plugin-shortcode-core getgrav:grav_plugin_shortcode_core (from the name)	before 6.2.2	CNA record

References

https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgphx-refsource-confirm
https://github.com/getgrav/grav-plugin-shortcode-core/commit/2a55eac8a2cc7f6c2d4923ab2fa7991039620597x-refsource-misc
https://github.com/getgrav/grav-plugin-shortcode-core/releases/tag/6.2.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.