XSS in Getgrav Grav
CVE-2020-37256
Grav before 1.6.30 contains a cross-site scripting vulnerability in the Admin plugin page editor default security configuration. Privileged users with page editing capabilities can inject malicious scripts to execute arbitrary code and install malicious plugins for system access.
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: 0.003 (19.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Getgrav Grav
- Grav — versions 0, 1.6.30
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-cvmr-6428-87w9 (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/grav-cross-site-scripting-in-admin-plugin-page-edi… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2020-37256?
- CVE-2020-37256 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-25.
- How severe is CVE-2020-37256?
- Medium severity. CVSS v3 base score is 5.4 out of 10.