- Component Type: TYPO3 CMS
- Subcomponent: Login Handling (ext:core)
- Release Date: March 16, 2021
- Vulnerability Type: Open Redirection
- Affected Versions: 6.2.0-6.2.56, 7.0.0-7.6.50, 8.0.0-8.7.39, 9.0.0-9.5.24, 10.0.0-10.4.13, 11.0.0-11.1.0
- Severity: Medium
- Suggested CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:F/RL:O/RC:C
- References: CVE-2021-21338, CWE-601
It has been discovered that Login Handling is susceptible to open redirection which allows attackers redirecting to arbitrary content, and conducting phishing attacks. No authentication is required in order to exploit this vulnerability.
Update to TYPO3 versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.
Thanks to Alexander Kellner on behalf of Bayerische Staatsbibliothek who reported this issue and to TYPO3 security team member Torben Hansen who fixed the issue.
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