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• CVSS v3.1: AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C
• CWE-79

Problem

It has been discovered that link tags generated by typolink functionality are vulnerable to cross-site scripting - properties being assigned as HTML attributes have not been parsed correctly.

Solution

Update to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described.

Credits

Thanks to Josef Glatz who reported this issue and to TYPO3 security team member Oliver Hader who fixed the issue.

References

• https://typo3.org/security/advisory/typo3-core-sa-2020-003