XSS in Getgrav Grav
CVE-2026-75828
Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers when page content is rendered.
Vulnerability class: XSS (Cross-Site Scripting)
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75828?
- CVE-2026-75828 is a high-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-08-18.
- How severe is CVE-2026-75828?
- High severity. CVSS v3 base score is 8.7 out of 10.