GHSA-x428-565f-8xj2: Typo3/cms core Cross-Site Scripting Vulnerability

HIGH
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CVSS 8.8
CWE-79 CWE-22
Published
Advisory Summary

GHSA-x428-565f-8xj2 is a HIGH (CVSS 8.8) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves typo3 arbitrary code execution and cross-site scripting in backend api. Remediation is available by upgrading affected packages to version 8.7.27, 9.5.8.

GHSA-x428-565f-8xj2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-x428-565f-8xj2
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Typo3/cms core
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-x428-565f-8xj2

To remediate this vulnerability, upgrade all affected Typo3/cms core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

typo3/cms-core fixed: 8.7.27 
Upgrade typo3/cms-core to 8.7.27
typo3/cms-core fixed: 9.5.8 
Upgrade typo3/cms-core to 9.5.8
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 typo3/cms-core

How to Check if You Are Affected

To determine whether your application is affected by GHSA-x428-565f-8xj2, inspect your project dependencies for Typo3/cms core:

inspect dependencies for typo3/cms-core

Analyze the terminal output to locate any version of Typo3/cms core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.7.27), 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 Typo3/cms core, 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

Backend API configuration using Page TSconfig is vulnerable to arbitrary code execution and cross-site scripting. TSconfig fields of page properties in backend forms can be used to inject malicious sequences. Field tsconfig_includes is vulnerable to directory traversal leading to same scenarios as having direct access to TSconfig settings. A valid backend user account having access to modify values for fields `pages.TSconfig` and `pages.tsconfig_includes` is needed in order to exploit this vulnerability.

GHSA-x428-565f-8xj2 Affected Typo3/cms core Versions

2 component(s)
Fixed Versions:
8.7.279.5.8
Product / Package Ecosystem Affected Versions Fixed Version
typo3/cms-core
 Packagist
≥ 8.0.0
< 8.7.27
8.7.27
typo3/cms-core
 Packagist
≥ 9.0.0
< 9.5.8
9.5.8

References

Security Fix Commit FIX COMMIT
https://github.com/TYPO3-CMS/core/commit/3a99a0877de6ad9cb39ba73146292b90e13294db
Security Fix Commit FIX COMMIT
https://github.com/TYPO3-CMS/core/commit/822e62ec267fbe3c70a26f1c4f73f47fc615c930
Typo3/cms core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-06-25-4.yaml
Typo3/cms core Source Repository REPOSITORY
https://github.com/TYPO3-CMS/core
Typo3/cms core Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2019-019

Frequently Asked Questions

What is GHSA-x428-565f-8xj2?
GHSA-x428-565f-8xj2 is a security vulnerability in Typo3/cms core involving TYPO3 Arbitrary Code Execution and Cross-Site Scripting in Backend API under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Typo3/cms core versions are affected?
Affected versions include releases prior to 8.7.27, 9.5.8 across affected packages: typo3/cms-core.
What version fixes GHSA-x428-565f-8xj2?
Upgrading to 8.7.27, 9.5.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms-core affected?
Yes, typo3/cms-core is affected in releases prior to 8.7.27, 9.5.8. Upgrade your dependency to 8.7.27, 9.5.8 or later.
What is the CVSS score of GHSA-x428-565f-8xj2?
GHSA-x428-565f-8xj2 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-x428-565f-8xj2?
GHSA-x428-565f-8xj2 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-x428-565f-8xj2?
Run the dependency tree command: 'inspect dependencies for typo3/cms-core'. 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-x428-565f-8xj2",
  "modified" : "2024-05-30T18:27:24Z",
  "published" : "2024-05-30T18:27:24Z",
  "aliases" : [ ],
  "summary" : "TYPO3 Arbitrary Code Execution and Cross-Site Scripting in Backend API",
  "details" : "Backend API configuration using Page TSconfig is vulnerable to arbitrary code execution and cross-site scripting. TSconfig fields of page properties in backend forms can be used to inject malicious sequences. Field tsconfig_includes is vulnerable to directory traversal leading to same scenarios as having direct access to TSconfig settings.\n\nA valid backend user account having access to modify values for fields `pages.TSconfig` and `pages.tsconfig_includes` is needed in order to exploit this vulnerability.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.7.27"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3-CMS/core/commit/3a99a0877de6ad9cb39ba73146292b90e13294db"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3-CMS/core/commit/822e62ec267fbe3c70a26f1c4f73f47fc615c930"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-06-25-4.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3-CMS/core"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2019-019"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-30T18:27:24Z",
    "nvd_published_at" : null
  }
}