Fluid Attacks Database

Description

Cross-Site Scripting in Page Preview

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

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
packagist	typo3/cms-core	>=9.0.0 <9.5.28 \|\| >=10.0.0 <10.4.18 \|\| >=11.0.0 <11.3.1	9.5.28, 10.4.18, 11.3.1
packagist	typo3/cms	>=10.0.0 <10.4.18 \|\| >=11.0.0 <11.3.1 \|\| >=9.0.0 <9.5.28	10.4.18, 11.3.1, 9.5.28

Aliases

1. CVE-2021-326672. NVD-2021-326673. OSV-2021-326674. GHSA-8mq9-fqv8-59wf5. GCVE-2021-32667

References

1. https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-8mq9-fqv8-59wf2. https://github.com/TYPO3/typo3/security/advisories/GHSA-8mq9-fqv8-59wf3. https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-32667.yaml4. https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-32667.yaml5. https://typo3.org/security/advisory/typo3-core-sa-2021-009