Cross-Site Scripting Vulnerability in Grav Shortcode Core Plugin
CVE-2026-64851

8.5HIGH

Key Information:

Vendor

WordPress
Status
Grav-plugin-shortcode-core
Vendor
CVE Published:
19 August 2026

What is CVE-2026-64851?

The Grav Shortcode Core Plugin prior to version 6.2.2 is vulnerable to a stored cross-site scripting (XSS) attack. This vulnerability arises when admin users can manipulate shortcode syntax, allowing them to concatenate attacker-controlled parameters into HTML without proper encoding. As a result, malicious scripts can be executed in the context of users who access affected pages. The issue has been addressed in version 6.2.2, and users are advised to upgrade to mitigate potential risks.

Affected Version(s)

grav-plugin-shortcode-core < 6.2.2

References

https://github.com/getgrav/grav/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/getgrav/grav-plugin-shortcode-core/com...
x_refsource_MISC
https://github.com/getgrav/grav-plugin-shortcode-core/rel...
x_refsource_MISC

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.