Vulnerability · Published Jun 25, 2026 · Assigned by VulnCheck
CVE-2020-37256Grav - Cross-Site Scripting in Admin Plugin Page Editor
Medium 5.4
In plain English
A medium-severity cross-site scripting in Grav from Grav. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 78.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | getgrav/grav | 1.6.30 | GHSA-cvmr-6428-87w9 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-cvmr-6428-87w9) vendor-advisory
- VulnCheck Advisory: Grav - Cross-Site Scripting in Admin Plugin Page Editor third-party-advisory