🛡️ CVE-2023-47125 — html-sanitizer

🟡 CVSS 5.0 — Medium ✅ No Known Exploit CWE-79 NVD
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Bypassing Cross-Site Scripting Protection in TYPO3 HTML Sanitizer

> ### 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

DOM processing instructions are not handled correctly. 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 1.5.3 or 2.1.4 that fix the problem described.

Credits

Thanks to Yaniv Nizry and Niels Dossche who reported this issue, and to TYPO3 core & security team member Oliver Hader who fixed the issue.

References

  • [TYPO3-CORE-SA-2023-007](https://typo3.org/security/advisory/typo3-core-sa-2023-007)
  • [Context & Details at masterminds/html5](https://github.com/Masterminds/html5-php/issues/241)

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2023-47125 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2023-47125 is recorded against 3 packages.

  • html-sanitizer (from 2.0.0 up to 2.1.4)
  • typo3
  • typo3/html-sanitizer (from 2.0.0 up to 2.1.4)

Timeline and source

Published on 14 November 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
typo3.org
github.com
github.com
typo3.org

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2023-11-14
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
html-sanitizer 2.0.0 2.1.4
typo3
typo3/html-sanitizer 2.0.0 2.1.4

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in html-sanitizer

CVE-2023-47125 is rated CVSS 5.0 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.