MEDIUM4.6

GHSA-5wx6-xwxf-q8qj

Cross-Site Scripting in TYPO3 Backend

Quick fix

GHSA-5wx6-xwxf-q8qj — typo3/cms: upgrade to the fixed version with the command below.

composer require typo3/cms:^6.2.20

Details

Failing to properly encode user input, some backend components are vulnerable to Cross-Site Scripting. A valid backend user account is needed to exploit this vulnerability.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/typo3/cms

Introduced in: 6.2.0Fixed in: 6.2.20

Fixcomposer require typo3/cms:^6.2.20

Packagist/typo3/cms

Introduced in: 7.6.0Fixed in: 7.6.5

Fixcomposer require typo3/cms:^7.6.5

Packagist/typo3/cms

Introduced in: 8.0.0Fixed in: 8.0.1

Fixcomposer require typo3/cms:^8.0.1

References

https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2016-04-12-1.yaml[WEB]
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-009[WEB]