SB2020121038 - Cross-site scripting in Grav CMS

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Main Vulnerability Database SB2020121038

SB2020121038 - Cross-site scripting in Grav CMS

Published: December 10, 2020 Updated: May 5, 2026

Security Bulletin ID SB2020121038
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Cross-site scripting (CVE-ID: N/A)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to cross-site scripting in the Admin plugin page editor when editing pages with the default security configuration. A remote user can inject a crafted script to execute arbitrary code.

Exploitation requires the ability to edit pages and can lead to execution of functionality on behalf of a stolen administrative account, which may then be used to install a custom plugin containing a web shell.


Remediation

Install update from vendor's website.

References