CVE-2023-38500: By-passing Cross-Site Scripting Protection in HTML Sanitizer
First published: Tue Jul 25 2023(Updated: )
> ### CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (4.4) ### Problem Due to an encoding issue in the serialization layer, malicious markup nested in a `noscript` element was not encoded correctly. `noscript` is disabled in the default configuration, but might have been enabled in custom scenarios. This allows bypassing the cross-site scripting mechanism of [`typo3/html-sanitizer`](https://packagist.org/packages/typo3/html-sanitizer). ### Solution Update to `typo3/html-sanitizer` versions 1.5.1 or 2.1.2 that fix the problem described. ### Credits Thanks to David Klein and Yaniv Nizry who reported this issue, and to TYPO3 security team members Oliver Hader and Benjamin Franzke who fixed the issue. ### References * [TYPO3-CORE-SA-2023-002](https://typo3.org/security/advisory/typo3-core-sa-2023-002)
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/typo3/html-sanitizer | >=2.0.0<2.1.2 | 2.1.2 |
| composer/typo3/html-sanitizer | >=1.0.0<1.5.1 | 1.5.1 |
| TYPO3 HTML Sanitizer | >=1.0.0<1.5.1 | |
| TYPO3 HTML Sanitizer | >=2.0.0<2.1.2 |
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Reference Links
- https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-59jf-3q9v-rh6g
- https://nvd.nist.gov/vuln/detail/CVE-2023-38500
- https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb
- https://typo3.org/security/advisory/typo3-core-sa-2023-002
- https://github.com/advisories/GHSA-59jf-3q9v-rh6g (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-38500?
The severity of CVE-2023-38500 is medium with a CVSS score of 6.1.
What is the affected software for CVE-2023-38500?
The affected software for CVE-2023-38500 is TYPO3 HTML Sanitizer versions between 2.0.0 and 2.1.2, and versions between 1.0.0 and 1.5.1.
How can I fix CVE-2023-38500?
To fix CVE-2023-38500, update TYPO3 HTML Sanitizer to version 2.1.2 for versions 2.0.0 to 2.1.2, or update to version 1.5.1 for versions 1.0.0 to 1.5.1.
What is the Common Weakness Enumeration (CWE) for CVE-2023-38500?
The CWE for CVE-2023-38500 is CWE-79 (Improper Neutralization of Input During Web Page Generation).
Where can I find more information about CVE-2023-38500?
You can find more information about CVE-2023-38500 in the following references: [GitHub Security Advisory](https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-59jf-3q9v-rh6g), [GitHub Commit](https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb), [TYPO3 Security Advisory](https://typo3.org/security/advisory/typo3-core-sa-2023-002).
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