By-passing Cross-Site Scripting Protection in HTML Sanitizer
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions DOM processing instructions are not handled correctly. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer. This vulnerability has been addressed in versions 1.5.3 and 2.1.4. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00579 47th percentileScored 2026-11-07
Fix Fixed html-sanitizer (TYPO3): 1.5.3, 2.1.4typo3/html-sanitizer (Packagist): 1.5.3, 2.1.4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TYPO3 | html-sanitizer | 1.0.0 to before 1.5.3; 2.0.0 to before 2.1.4 | 1.5.3, 2.1.4 | Patch available | CNA |
| — | typo3/html-sanitizer (Packagist) | 1.0.0 to before 1.5.3 | 1.5.3 | Patch available | GHSA-mm79-jhqm-9j54 |
| — | typo3/html-sanitizer (Packagist) | 2.0.0 to before 2.1.4 | 2.1.4 | Patch available | GHSA-mm79-jhqm-9j54 |
- html-sanitizer VendorTYPO3 Affected 1.0.0 to before 1.5.3; 2.0.0 to before 2.1.4 Fixed in 1.5.3, 2.1.4 Patch available CNA
- typo3/html-sanitizer (Packagist) Vendor— Affected 1.0.0 to before 1.5.3 Fixed in 1.5.3 Patch available GHSA-mm79-jhqm-9j54
- typo3/html-sanitizer (Packagist) Vendor— Affected 2.0.0 to before 2.1.4 Fixed in 2.1.4 Patch available GHSA-mm79-jhqm-9j54
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:typo3:html_sanitizer:*:*:*:*:*:*:*:* | 1.0.0 to before 1.5.3; 2.0.0 to before 2.1.4 | Vulnerable | TYPO3 |
| cpe:2.3:a:typo3:typo3:*:*:*:*:elts:*:*:* | 8.7.42 to before 8.7.55; 9.5.29 to before 9.5.44; 10.4.19 to before 10.4.41 | Vulnerable | TYPO3 |
| cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* | 11.3.2 to before 11.5.33; 12.0.0 to before 12.4.8 | Vulnerable | TYPO3 |
- cpe:2.3:a:typo3:html_sanitizer:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.5.3; 2.0.0 to before 2.1.4 Vulnerable ·TYPO3
- cpe:2.3:a:typo3:typo3:*:*:*:*:elts:*:*:* Versions 8.7.42 to before 8.7.55; 9.5.29 to before 9.5.44; 10.4.19 to before 10.4.41 Vulnerable ·TYPO3
- cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* Versions 11.3.2 to before 11.5.33; 12.0.0 to before 12.4.8 Vulnerable ·TYPO3
Remediation
- Fix · CNA html-sanitizer (TYPO3) Fixed in 1.5.3, 2.1.4
- Fix · GHSA-mm79-jhqm-9j54 typo3/html-sanitizer (Packagist) Fixed in 1.5.3 Advisory →
- Fix · GHSA-mm79-jhqm-9j54 typo3/html-sanitizer (Packagist) Fixed in 2.1.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-47125
- 2026-10-03 Alias added: GHSA-mm79-jhqm-9j54
References
Advisory 3
More TYPO3 Html Sanitizer vulnerabilities
- TI-2022-16445 Bypass of Cross-Site Scripting Protection in typo3/html-sanitizer CVSS 3.1MEDIUM 6.1
- TI-2023-19880 By-passing Cross-Site Scripting Protection in HTML Sanitizer CVSS 3.1MEDIUM 6.1
- TI-2022-07558 Cross-Site Scripting Protection bypass in HTML Sanitizer CVSS 3.1MEDIUM 6.1
Sources
- CVE-2023-47125 · CVE Program
- CVE-2023-47125 · NVD
- FIRST EPSS
- GHSA-mm79-jhqm-9j54 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences