Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form
Problem
It has been discovered that the Form Designer backend module of the Form Framework is vulnerable to cross-site scripting. A valid backend user account with access to the form module is needed to exploit this vulnerability.
Solution
Update to TYPO3 versions 10.4.14 or 11.1.1 that fix the problem described.
Credits
Thanks to Richie Lee who reported this issue and to TYPO3 framework merger Andreas Fernandez who fixed the issue.
References
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms | >= 10.0.0, < 10.4.14, >= 11.0.0, < 11.1.1 | 10.4.14, 11.1.1 |
| Composer package | typo3/cms-core | >= 10.0.0, < 10.4.14, >= 11.0.0, < 11.1.1 | 10.4.14, 11.1.1 |
| Composer package | typo3/cms-form | >= 10.2.0, < 10.4.14, >= 11.0.0, < 11.1.1 | 10.4.14, 11.1.1 |
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x79j-wgqv-g8h2
- https://nvd.nist.gov/vuln/detail/CVE-2021-21358
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21358.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21358.yaml
- https://packagist.org/packages/typo3/cms-form
- https://typo3.org/security/advisory/typo3-core-sa-2021-004
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
typo3/cms, typo3/cms-core, typo3/cms-form- Disclosed
- 23.03.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-x79j-wgqv-g8h2 - CC BY 4.0
Vulnerability history: typo3/cms
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
- 188
- First → latest
- 09.2018 06.2024
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 41
- Medium 128
- Low 13
Disclosures per year
- 2018: 2
- 2019: 0
- 2020: 13
- 2021: 15
- 2022: 85
- 2023: 1
- 2024: 72
- 2025: 0
- 2026: 0
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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form this entry
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