TYPO3 Cross-Site Scripting in Online Media Asset Rendering
Failing to properly encode user input, online media asset rendering (*.youtube and *.vimeo files) is vulnerable to cross-site scripting. A valid backend user account or write access on the server system (e.g. SFTP) is needed in order to exploit this vulnerability.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms-core | >= 8.0.0, < 8.7.21, >= 9.0.0, < 9.5.2 | 8.7.21, 9.5.2 |
References
- https://github.com/TYPO3-CMS/core/commit/23800859368e2af60604ff27f3eed9971ccd9fbd
- https://github.com/TYPO3-CMS/core/commit/f9e5e255f41c248e115b2a755b797ce48d10d72a
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2018-12-11-1.yaml
- https://github.com/TYPO3-CMS/core
- https://typo3.org/security/advisory/typo3-core-sa-2018-006
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
typo3/cms-core- Disclosed
- 30.05.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wg8h-gxf4-g4gh - 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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TYPO3 Cross-Site Scripting in Online Media Asset Rendering this entry
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