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.

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

References

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

References

• GHSA-4j77-gg36-9864
• https://nvd.nist.gov/vuln/detail/CVE-2020-11065
• https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11065.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11065.yaml
• https://typo3.org/security/advisory/typo3-core-sa-2020-003