XSS in Getgrav Grav
CVE-2026-72821
Grav Form plugin versions before 9.1.15 contain a stored cross-site scripting vulnerability in radio and toggle field option labels rendered with the Twig |raw filter. Attackers with form authoring permissions can inject HTML and script payloads in option labels that execute in the browsers of visitors and administrators viewing the form.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Getgrav Grav — versions 0, 9.1.15
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-5xv4-g337-2pg7 (vendor-advisory)
- www.vulncheck.com/advisories/grav-form-plugin-before-stored-xss-via-radio-toggle (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72821?
- CVE-2026-72821 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-14.
- How severe is CVE-2026-72821?
- Medium severity. CVSS v3 base score is 5.4 out of 10.