Cross-Site Scripting via Rich-Text Content

Summary

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions failing to properly parse, sanitize and encode malicious rich-text content, the content rendering process in the website frontend is vulnerable to cross-site scripting. Corresponding rendering instructions via TypoScript functionality HTMLparser does not consider all potentially malicious HTML tag & attribute combinations per default. In default scenarios, a valid backend user account is needed to exploit this vulnerability. In case custom plugins used in the website frontend accept and reflect rich-text content submitted by users, no authentication is required. Update to TYPO3 versions 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19, 11.3.2 that fix the problem described.

Timeline

1. Aug 10, 2021, 4:30 PM UTCCVE published
2. Aug 3, 2024, 11:33 PM UTCRecord last updated

Affected versions

• TYPO3 TYPO3.CMS

  From 7.0.0 · fixed in 7.6.53; From 8.0.0 · fixed in 8.7.42; From 9.0.0 · fixed in 9.5.29; From 10.0.0 · fixed in 10.4.19; From 11.0.0 · fixed in 11.3.2

• typo3/cms-corePackagist

  From 7.0.0 · fixed in 7.6.53

• typo3/cms-corePackagist

  From 8.0.0 · fixed in 8.7.42

• typo3/cms-corePackagist

  From 10.0.0 · fixed in 10.4.19

• typo3/cms-corePackagist

  From 11.0.0 · fixed in 11.3.2

• typo3/cms-corePackagist

  From 9.0.0 · fixed in 9.5.29

• typo3/cmsPackagist

  From 10.0.0 · fixed in 10.4.19

• typo3/cmsPackagist

  From 11.0.0 · fixed in 11.3.2

• typo3/cmsPackagist

  From 9.0.0 · fixed in 9.5.29

• typo3/cmsPackagist

  From 8.0.0 · fixed in 8.7.42

• typo3/cmsPackagist

  From 7.0.0 · fixed in 7.6.53

References 2