Open Redirect Affecting typo3/cms 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
0.13% (49th percentile)

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  • Snyk IDSNYK-PHP-TYPO3CMS-1086559
  • 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 to version 11.1.1, 10.4.14, 9.5.25 or higher.

Overview

typo3/cms is a free open source Content Management Framework.

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