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CVE-2026-64628 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph	CISA-ADP	AdvisoryExploitTechnical DescriptionVendor
https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph	[email protected]	AdvisoryExploitTechnical DescriptionVendor
https://www.vulncheck.com/advisories/grav-stored-cross-site-scripting-via-shortcode-attribute-handlers	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
Grav	<= 6.2.1 (semver)
CPE cpe:2.3:a:getgrav:grav:::::::: Remediation No remediation found in references.

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 23, 2026	CVE Modified	CISA-ADP
Jul 21, 2026	New CVE Received	[email protected]