CVE-2021-21365
Cross-Site Scripting in Bootstrap Package
Description
### Problem It has been discovered that rendering content in the website frontend is vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. The following templates are affected by the vulnerability: * `Resources/Private/Partials/ContentElements/Carousel/Item/CallToAction.html` * `Resources/Private/Partials/ContentElements/Carousel/Item/Header.html` * `Resources/Private/Partials/ContentElements/Carousel/Item/Text.html` * `Resources/Private/Partials/ContentElements/Carousel/Item/TextAndImage.html` * `Resources/Private/Partials/ContentElements/Header/SubHeader.html` Users of the extension, who have overwritten the affected templates with custom code must manually apply the security fix as shown in [this Git commit](https://github.com/benjaminkott/bootstrap_package/commit/de3a568fc311d6712d9339643e51e8627c80530b). ### Solution Update to version 7.1.2, 8.0.8, 9.0.4, 9.1.3, 10.0.10 or 11.0.3 of the Bootstrap Package that fix the problem described. Updated version are available from the TYPO3 extension manager, Packagist and at https://extensions.typo3.org/extension/download/bootstrap_package/. ### Credits Thanks to TYPO3 security team member Oliver Hader who reported and fixed the issue.
How to fix CVE-2021-21365
To remediate CVE-2021-21365, upgrade the affected package to a fixed version below.
- —upgrade to 7.1.2 or later
- —upgrade to 7.1.2 or later
Is CVE-2021-21365 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 7.1.2, >= 8.0.0, < 8.0.8, >= 9.0.0, < 9.0.4, >= 9.1.0, < 9.1.3, >= 10.0.0, < 10.0.10, >= 11.0.0, < 11.0.3