Medium severity4.7NVD Advisory· Published Mar 23, 2021· Updated Jun 17, 2026
CVE-2021-21338
CVE-2021-21338
Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
typo3/cms-corePackagist | >= 6.2.0, < 6.2.57 | 6.2.57 |
typo3/cms-corePackagist | >= 7.0.0, < 7.6.51 | 7.6.51 |
typo3/cms-corePackagist | >= 8.0.0, < 8.7.40 | 8.7.40 |
typo3/cms-corePackagist | >= 10.0.0, < 10.4.14 | 10.4.14 |
typo3/cms-corePackagist | >= 11.0.0, < 11.1.1 | 11.1.1 |
typo3/cms-corePackagist | >= 9.0.0, < 9.5.25 | 9.5.25 |
typo3/cmsPackagist | >= 10.0.0, < 10.4.14 | 10.4.14 |
typo3/cmsPackagist | >= 11.0.0, < 11.1.1 | 11.1.1 |
typo3/cmsPackagist | >= 9.0.0, < 9.5.25 | 9.5.25 |
Affected products
4- osv-coords3 versions
>= 6.2.0, < 6.2.57+ 2 more
- (no CPE)range: >= 6.2.0, < 6.2.57
- (no CPE)range: >= 10.0.0, < 10.4.14
- (no CPE)range: >= 6.2.0, < 6.2.57
Patches
Vulnerability mechanics
References
7- github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4jhw-2p6j-5wmpnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-4jhw-2p6j-5wmpghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-21338ghsaADVISORY
- packagist.org/packages/typo3/cms-corenvdRelease NotesThird Party AdvisoryWEB
- typo3.org/security/advisory/typo3-core-sa-2021-001nvdVendor AdvisoryWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21338.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21338.yamlghsaWEB
News mentions
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