# CVE-2022-23499: TYPO3 HTML Sanitizer vulnerable to Cross-Site Scripting

Source: https://junglewise.ai/threats/cve-2022-23499-typo3-html-sanitizer-vulnerable-to-cross-site-scripting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-12-13  
License: CC BY 4.0 with a link back

CVE-2022-23499 · Severity: low · CVSS 3.1 · Published 2022-12-13

TYPO3 HTML Sanitizer vulnerable to Cross-Site Scripting

Technologies: [typo3/cms (Packagist)](https://junglewise.ai/threats/technologies/packagist-typo3-cms), [typo3/html-sanitizer (Packagist)](https://junglewise.ai/threats/technologies/typo3-html-sanitizer). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2022-23499 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2022-23499 being exploited in the wild.

**How severe is CVE-2022-23499?** Low severity, with a CVSS score of 3.1, published 13 December 2022.

**Which products and versions are affected?** typo3/cms (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.33; typo3/html-sanitizer (Packagist) ECOSYSTEM:introduced=1.0.0,fixed=1.5.0.

**Is there a fix for CVE-2022-23499?** Yes. typo3/cms (Packagist): upgrade to 10.4.33 or later; typo3/html-sanitizer (Packagist): upgrade to 1.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2022-23499?** Check whether you run typo3/cms (Packagist) or typo3/html-sanitizer (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- typo3/cms (Packagist): upgrade to 10.4.33 or later

  ```sh
  composer require typo3/cms:^10.4.33
  ```

- typo3/html-sanitizer (Packagist): upgrade to 1.5.0 or later

  ```sh
  composer require typo3/html-sanitizer:^1.5.0
  ```


## Affected products

- typo3/cms (Packagist) ECOSYSTEM:introduced=10.0.0,fixed=10.4.33
- typo3/html-sanitizer (Packagist) ECOSYSTEM:introduced=1.0.0,fixed=1.5.0

## Identifiers

- CVE-2022-23499
- GHSA-hvwx-qh2h-xcfj

## Related threats

- [TYPO3 html-sanitizer XSS bypass via incorrect namespace encoding](https://junglewise.ai/threats/cve-2026-47345-typo3-html-sanitizer-xss-bypass-via-incorrect-namespace-encoding)
- [TYPO3 html-sanitizer XSS bypass via whitespace-variant closing tags](https://junglewise.ai/threats/cve-2026-47344-typo3-html-sanitizer-xss-bypass-via-whitespace-variant-closing)
- [TYPO3 Denial of Service in Online Media Asset Handling](https://junglewise.ai/threats/typo3-denial-of-service-in-online-media-asset-handling-4f64c9d7)
- [TYPO3 Information Disclosure in Install Tool](https://junglewise.ai/threats/typo3-information-disclosure-in-install-tool-02427278)
- [TYPO3 Security Misconfiguration in Install Tool Cookie](https://junglewise.ai/threats/typo3-security-misconfiguration-in-install-tool-cookie-06a36c1d)