Open Redirect Affecting typo3/cms-core package, versions >=11.0.0, <11.1.1>=10.0.0, <10.4.14<9.5.25


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-PHP-TYPO3CMSCORE-1086573
  • published18 Mar 2021
  • disclosed17 Mar 2021
  • creditAlexander Kellner, Bayerische Staatsbibliothek

Introduced: 17 Mar 2021

CVE-2021-21338  (opens in a new tab)
CWE-601  (opens in a new tab)

How to fix?

Upgrade typo3/cms-core to version 11.1.1, 10.4.14, 9.5.25 or higher.

Overview

typo3/cms-core is a free open source enterprise content management system.

Affected versions of this package are vulnerable to Open Redirect via Login Handling. This allows attackers to redirect to arbitrary content, and conduct phishing attacks. This is caused due to a missing check in GeneralUtility::sanitizeLocalUrl(), which resulted in any URL starting with // to be considered as a local URL.

CVSS Scores

version 3.1