CVE-2022-23499: Typo3/html sanitizer Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-hvwx-qh2h-xcfj
CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2022-23499 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Typo3/html sanitizer libraries in the Packagist ecosystem. The issue involves typo3 html sanitizer vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 1.5.0, 2.1.1, 10.4.33, 11.5.20, 12.1.1.

CVE-2022-23499 at a Glance

CVE Identifier CVE-2022-23499
GHSA Identifier GHSA-hvwx-qh2h-xcfj
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Typo3/html sanitizer
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

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

How to Fix CVE-2022-23499

To remediate this vulnerability, upgrade all affected Typo3/html sanitizer 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/html-sanitizer fixed: 1.5.0
Upgrade typo3/html-sanitizer to 1.5.0
typo3/html-sanitizer fixed: 2.1.1
Upgrade typo3/html-sanitizer to 2.1.1
typo3/cms fixed: 10.4.33
Upgrade typo3/cms to 10.4.33
typo3/cms fixed: 11.5.20
Upgrade typo3/cms to 11.5.20
typo3/cms fixed: 12.1.1
Upgrade typo3/cms to 12.1.1
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/html-sanitizer

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-23499, inspect your project dependencies for Typo3/html sanitizer:

inspect dependencies for typo3/html-sanitizer

Analyze the terminal output to locate any version of Typo3/html sanitizer in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.0), 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/html sanitizer, 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

### Problem Due to a parsing issue in the upstream package [`masterminds/html5`](https://packagist.org/packages/masterminds/html5), malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized. This allows bypassing the cross-site scripting mechanism of [`typo3/html-sanitizer`](https://packagist.org/packages/typo3/html-sanitizer). Besides that, the upstream package `masterminds/html5` provides HTML raw text elements (`script`, `style`, `noframes`, `noembed` and `iframe`) as DOMText nodes, which were not processed and sanitized further. None of the mentioned elements were defined in the default builder configuration, that's why only custom behaviors, using one of those tag names, were vulnerable to cross-site scripting. ### Solution Update to `typo3/html-sanitizer` versions 1.5.0 or 2.1.1 that fix the problem described.

CVE-2022-23499 Affected Typo3/html sanitizer Versions

5 component(s)
Fixed Versions:
1.5.02.1.110.4.3311.5.2012.1.1
Product / Package Ecosystem Affected Versions Fixed Version
typo3/html-sanitizer
Packagist
≥ 1.0.0
< 1.5.0
1.5.0
typo3/html-sanitizer
Packagist
≥ 2.0.0
< 2.1.1
2.1.1
typo3/cms
Packagist
≥ 10.0.0
< 10.4.33
10.4.33
typo3/cms
Packagist
≥ 11.0.0
< 11.5.20
11.5.20
typo3/cms
Packagist
≥ 12.0.0
< 12.1.1
12.1.1

References

Frequently Asked Questions

What is CVE-2022-23499?
CVE-2022-23499 is a security vulnerability in Typo3/html sanitizer involving TYPO3 HTML Sanitizer vulnerable to Cross-Site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Typo3/html sanitizer versions are affected?
Affected versions include releases prior to 1.5.0, 2.1.1, 10.4.33, 11.5.20, 12.1.1 across affected packages: typo3/html-sanitizer, typo3/cms.
What version fixes CVE-2022-23499?
Upgrading to 1.5.0, 2.1.1, 10.4.33, 11.5.20, 12.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/html-sanitizer affected?
Yes, typo3/html-sanitizer is affected in releases prior to 1.5.0, 2.1.1. Upgrade your dependency to 1.5.0, 2.1.1 or later.
Is typo3/cms affected?
Yes, typo3/cms is affected in releases prior to 10.4.33, 11.5.20, 12.1.1. Upgrade your dependency to 10.4.33, 11.5.20, 12.1.1 or later.
What is the CVSS score of CVE-2022-23499?
CVE-2022-23499 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2022-23499?
CVE-2022-23499 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 CVE-2022-23499?
Run the dependency tree command: 'inspect dependencies for typo3/html-sanitizer'. 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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hvwx-qh2h-xcfj",
  "modified" : "2022-12-13T16:59:12Z",
  "published" : "2022-12-13T16:59:12Z",
  "aliases" : [ "CVE-2022-23499" ],
  "summary" : "TYPO3 HTML Sanitizer vulnerable to Cross-Site Scripting",
  "details" : "### Problem\nDue to a parsing issue in the upstream package [`masterminds/html5`](https://packagist.org/packages/masterminds/html5), malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized. This allows bypassing the cross-site scripting mechanism of [`typo3/html-sanitizer`](https://packagist.org/packages/typo3/html-sanitizer).\n\nBesides that, the upstream package `masterminds/html5` provides HTML raw text elements (`script`, `style`, `noframes`, `noembed` and `iframe`) as DOMText nodes, which were not processed and sanitized further. None of the mentioned elements were defined in the default builder configuration, that's why only custom behaviors, using one of those tag names, were vulnerable to cross-site scripting.\n\n### Solution\nUpdate to `typo3/html-sanitizer` versions 1.5.0 or 2.1.1 that fix the problem described.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/html-sanitizer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0"
      }, {
        "fixed" : "1.5.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/html-sanitizer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.1.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.4.33"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "11.0.0"
      }, {
        "fixed" : "11.5.20"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "12.0.0"
      }, {
        "fixed" : "12.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-23499"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/html-sanitizer/pull/105"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/html-sanitizer/pull/106"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2022-23499.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3/html-sanitizer"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/html-sanitizer/releases/tag/v1.5.0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/html-sanitizer/releases/tag/v2.1.1"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2022-017"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-13T16:59:12Z",
    "nvd_published_at" : "2022-12-13T21:15:00Z"
  }
}