CVE-2021-32667

Description

> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC` (5.0) ### Problem Failing to properly encode _Page TSconfig_ settings, corresponding page preview module (_Web>View_) is vulnerable to persistent cross-site scripting. A valid backend user account is needed to exploit this vulnerability. ### Solution Update to TYPO3 versions 9.5.28, 10.4.18, 11.3.1 that fix the problem described. ### Credits Thanks to TYPO3 core merger Oliver Bartsch who reported and fixed the issue. ### References * [TYPO3-CORE-SA-2021-009](https://typo3.org/security/advisory/typo3-core-sa-2021-009)

How to fix CVE-2021-32667

To remediate CVE-2021-32667, upgrade the affected package to a fixed version below.

• —upgrade to 9.5.287 or later
• —upgrade to 10.4.18 or later
• —upgrade to 9.5.28 or later

Is CVE-2021-32667 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• >= 9.0.0, < 9.5.287, >= 10.0.0, < 10.4.17, >= 11.0.0, < 11.3.0
• >= 10.0.0, < 10.4.18
• >= 9.0.0, < 9.5.28

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-32667
• PATCHgithub.com/TYPO3/typo3
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-32667.yaml
• WEBgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-32667.yaml