CVE-2026-64628

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph
https://www.vulncheck.com/advisories/grav-stored-cross-site-scripting-via-shortcode-attribute-handlers
https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph

Configurations

No configuration.

History

23 Jul 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph -

21 Jul 2026, 12:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-21 12:19

Updated : 2026-07-23 19:17

NVD link : CVE-2026-64628

Mitre link : CVE-2026-64628

CVE.ORG link : CVE-2026-64628

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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