GHSA-cvmr-6428-87w9: Getgrav/grav Cross-Site Scripting Vulnerability

MODERATE
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CWE-79
Published
Advisory Summary

GHSA-cvmr-6428-87w9 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Getgrav/grav libraries in the Packagist ecosystem. The issue involves cross-site scripting in grav. Remediation is available by upgrading affected packages to version 1.6.30.

GHSA-cvmr-6428-87w9 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-cvmr-6428-87w9
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Getgrav/grav
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix GHSA-cvmr-6428-87w9

To remediate this vulnerability, upgrade all affected Getgrav/grav dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

getgrav/grav fixed: 1.6.30 
Upgrade getgrav/grav to 1.6.30
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for getgrav/grav

How to Check if You Are Affected

To determine whether your application is affected by GHSA-cvmr-6428-87w9, inspect your project dependencies for Getgrav/grav:

inspect dependencies for getgrav/grav

Analyze the terminal output to locate any version of Getgrav/grav in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.30), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Getgrav/grav, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Privileged users (with the ability to edit pages) have a mechanism to perform remote code execution via XSS. At a minimum, the vulnerability represents a bypass of security controls put in place to mitigate this form of attack. The remote code execution can be performed because XSS would allow an attacker to execute functionality on behalf of a stolen administrative account - the facility to install custom plugins would then allow said attacker to install a plugin containing a web shell and thus garner access to the underlying system. ### References https://owasp.org/www-project-top-ten/2017/A7_2017-Cross-Site_Scripting_(XSS) https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html https://cwe.mitre.org/data/definitions/79.html ### For more information Please contact contact@pentest.co.uk

GHSA-cvmr-6428-87w9 Affected Getgrav/grav Versions

1 component(s)
Fixed Versions:
1.6.30
Product / Package Ecosystem Affected Versions Fixed Version
getgrav/grav
 Packagist
< 1.6.30
1.6.30

References

GitHub Advisory / Wiki ADVISORY
https://github.com/getgrav/grav/security/advisories/GHSA-cvmr-6428-87w9

Frequently Asked Questions

What is GHSA-cvmr-6428-87w9?
GHSA-cvmr-6428-87w9 is a security vulnerability in Getgrav/grav involving Cross-Site Scripting in Grav under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Getgrav/grav versions are affected?
Affected versions include releases prior to 1.6.30 across affected packages: getgrav/grav.
What version fixes GHSA-cvmr-6428-87w9?
Upgrading to 1.6.30 (or the latest patched release for your respective branch) resolves the vulnerability.
Is getgrav/grav affected?
Yes, getgrav/grav is affected in releases prior to 1.6.30. Upgrade your dependency to 1.6.30 or later.
What CWE is associated with GHSA-cvmr-6428-87w9?
GHSA-cvmr-6428-87w9 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for GHSA-cvmr-6428-87w9?
Run the dependency tree command: 'inspect dependencies for getgrav/grav'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cvmr-6428-87w9",
  "modified" : "2020-12-10T23:12:52Z",
  "published" : "2020-12-10T23:13:08Z",
  "aliases" : [ ],
  "summary" : "Cross-Site Scripting in Grav",
  "details" : "### Impact\nPrivileged users (with the ability to edit pages) have a mechanism to perform remote code execution via XSS. At a minimum, the vulnerability represents a bypass of security controls put in place to mitigate this form of attack.\n\nThe remote code execution can be performed because XSS would allow an attacker to execute functionality on behalf of a stolen administrative account - the facility to install custom plugins would then allow said attacker to install a plugin containing a web shell and thus garner access to the underlying system.\n\n### References\nhttps://owasp.org/www-project-top-ten/2017/A7_2017-Cross-Site_Scripting_(XSS)\nhttps://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html\nhttps://cwe.mitre.org/data/definitions/79.html\n\n### For more information\nPlease contact contact@pentest.co.uk",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "getgrav/grav"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.30"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/getgrav/grav/security/advisories/GHSA-cvmr-6428-87w9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-12-10T23:12:52Z",
    "nvd_published_at" : null
  }
}