Cross-Site Scripting in TYPO3 CMS Form Engine
In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, it has been discovered that HTML placeholder attributes containing data of other database records are vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability.
Update to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described.
References
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms | >= 10.0.0, < 10.4.2, >= 9.0.0, < 9.5.17 | 10.4.2, 9.5.17 |
| Composer package | typo3/cms-core | >= 9.0.0, < 9.5.17, >= 10.0.0, < 10.4.2 | 9.5.17, 10.4.2 |
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-43gj-mj2w-wh46
- https://nvd.nist.gov/vuln/detail/CVE-2020-11064
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11064.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11064.yaml
- https://typo3.org/security/advisory/typo3-core-sa-2020-002
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
typo3/cms, typo3/cms-core- Disclosed
- 13.05.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-43gj-mj2w-wh46 - CC BY 4.0
Vulnerability history: typo3/cms-core
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 128
- First → latest
- 09.2018 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 35
- Medium 84
- Low 8
Disclosures per year
- 2018: 2
- 2019: 0
- 2020: 13
- 2021: 15
- 2022: 34
- 2023: 3
- 2024: 38
- 2025: 8
- 2026: 15
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Cross-Site Scripting in TYPO3 CMS Form Engine this entry
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