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Vulnerable Software

Vulnerability Details CVE-2021-21359

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This is fixed in versions 9.5.25, 10.4.14, 11.1.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.026
EPSS Ranking 84.7%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 5.0
Products affected by CVE-2021-21359
  • Typo3 » Typo3 » Version: 10.0.0
    cpe:2.3:a:typo3:typo3:10.0.0
  • Typo3 » Typo3 » Version: 10.0.10
    cpe:2.3:a:typo3:typo3:10.0.10
  • Typo3 » Typo3 » Version: 10.0.9
    cpe:2.3:a:typo3:typo3:10.0.9
  • Typo3 » Typo3 » Version: 10.1.0
    cpe:2.3:a:typo3:typo3:10.1.0
  • Typo3 » Typo3 » Version: 10.2.0
    cpe:2.3:a:typo3:typo3:10.2.0
  • Typo3 » Typo3 » Version: 10.2.1
    cpe:2.3:a:typo3:typo3:10.2.1
  • Typo3 » Typo3 » Version: 10.2.2
    cpe:2.3:a:typo3:typo3:10.2.2
  • Typo3 » Typo3 » Version: 10.3.0
    cpe:2.3:a:typo3:typo3:10.3.0
  • Typo3 » Typo3 » Version: 10.4.0
    cpe:2.3:a:typo3:typo3:10.4.0
  • Typo3 » Typo3 » Version: 10.4.1
    cpe:2.3:a:typo3:typo3:10.4.1
  • Typo3 » Typo3 » Version: 10.4.10
    cpe:2.3:a:typo3:typo3:10.4.10
  • Typo3 » Typo3 » Version: 10.4.11
    cpe:2.3:a:typo3:typo3:10.4.11
  • Typo3 » Typo3 » Version: 10.4.12
    cpe:2.3:a:typo3:typo3:10.4.12
  • Typo3 » Typo3 » Version: 10.4.13
    cpe:2.3:a:typo3:typo3:10.4.13
  • Typo3 » Typo3 » Version: 10.4.2
    cpe:2.3:a:typo3:typo3:10.4.2
  • Typo3 » Typo3 » Version: 10.4.3
    cpe:2.3:a:typo3:typo3:10.4.3
  • Typo3 » Typo3 » Version: 10.4.4
    cpe:2.3:a:typo3:typo3:10.4.4
  • Typo3 » Typo3 » Version: 10.4.5
    cpe:2.3:a:typo3:typo3:10.4.5
  • Typo3 » Typo3 » Version: 10.4.6
    cpe:2.3:a:typo3:typo3:10.4.6
  • Typo3 » Typo3 » Version: 10.4.7
    cpe:2.3:a:typo3:typo3:10.4.7
  • Typo3 » Typo3 » Version: 10.4.8
    cpe:2.3:a:typo3:typo3:10.4.8
  • Typo3 » Typo3 » Version: 10.4.9
    cpe:2.3:a:typo3:typo3:10.4.9
  • Typo3 » Typo3 » Version: 11.0.0
    cpe:2.3:a:typo3:typo3:11.0.0
  • Typo3 » Typo3 » Version: 11.0.2
    cpe:2.3:a:typo3:typo3:11.0.2
  • Typo3 » Typo3 » Version: 11.0.3
    cpe:2.3:a:typo3:typo3:11.0.3
  • Typo3 » Typo3 » Version: 11.1.0
    cpe:2.3:a:typo3:typo3:11.1.0
  • Typo3 » Typo3 » Version: 9.0.0
    cpe:2.3:a:typo3:typo3:9.0.0
  • Typo3 » Typo3 » Version: 9.0.3
    cpe:2.3:a:typo3:typo3:9.0.3
  • Typo3 » Typo3 » Version: 9.0.4
    cpe:2.3:a:typo3:typo3:9.0.4
  • Typo3 » Typo3 » Version: 9.1.0
    cpe:2.3:a:typo3:typo3:9.1.0
  • Typo3 » Typo3 » Version: 9.1.2
    cpe:2.3:a:typo3:typo3:9.1.2
  • Typo3 » Typo3 » Version: 9.1.3
    cpe:2.3:a:typo3:typo3:9.1.3
  • Typo3 » Typo3 » Version: 9.2.0
    cpe:2.3:a:typo3:typo3:9.2.0
  • Typo3 » Typo3 » Version: 9.2.1
    cpe:2.3:a:typo3:typo3:9.2.1
  • Typo3 » Typo3 » Version: 9.3.0
    cpe:2.3:a:typo3:typo3:9.3.0
  • Typo3 » Typo3 » Version: 9.3.1
    cpe:2.3:a:typo3:typo3:9.3.1
  • Typo3 » Typo3 » Version: 9.3.2
    cpe:2.3:a:typo3:typo3:9.3.2
  • Typo3 » Typo3 » Version: 9.3.3
    cpe:2.3:a:typo3:typo3:9.3.3
  • Typo3 » Typo3 » Version: 9.4.0
    cpe:2.3:a:typo3:typo3:9.4.0
  • Typo3 » Typo3 » Version: 9.5.0
    cpe:2.3:a:typo3:typo3:9.5.0
  • Typo3 » Typo3 » Version: 9.5.1
    cpe:2.3:a:typo3:typo3:9.5.1
  • Typo3 » Typo3 » Version: 9.5.10
    cpe:2.3:a:typo3:typo3:9.5.10
  • Typo3 » Typo3 » Version: 9.5.11
    cpe:2.3:a:typo3:typo3:9.5.11
  • Typo3 » Typo3 » Version: 9.5.12
    cpe:2.3:a:typo3:typo3:9.5.12
  • Typo3 » Typo3 » Version: 9.5.13
    cpe:2.3:a:typo3:typo3:9.5.13
  • Typo3 » Typo3 » Version: 9.5.14
    cpe:2.3:a:typo3:typo3:9.5.14
  • Typo3 » Typo3 » Version: 9.5.15
    cpe:2.3:a:typo3:typo3:9.5.15
  • Typo3 » Typo3 » Version: 9.5.16
    cpe:2.3:a:typo3:typo3:9.5.16
  • Typo3 » Typo3 » Version: 9.5.17
    cpe:2.3:a:typo3:typo3:9.5.17
  • Typo3 » Typo3 » Version: 9.5.18
    cpe:2.3:a:typo3:typo3:9.5.18
  • Typo3 » Typo3 » Version: 9.5.19
    cpe:2.3:a:typo3:typo3:9.5.19
  • Typo3 » Typo3 » Version: 9.5.2
    cpe:2.3:a:typo3:typo3:9.5.2
  • Typo3 » Typo3 » Version: 9.5.20
    cpe:2.3:a:typo3:typo3:9.5.20
  • Typo3 » Typo3 » Version: 9.5.21
    cpe:2.3:a:typo3:typo3:9.5.21
  • Typo3 » Typo3 » Version: 9.5.22
    cpe:2.3:a:typo3:typo3:9.5.22
  • Typo3 » Typo3 » Version: 9.5.23
    cpe:2.3:a:typo3:typo3:9.5.23
  • Typo3 » Typo3 » Version: 9.5.24
    cpe:2.3:a:typo3:typo3:9.5.24
  • Typo3 » Typo3 » Version: 9.5.3
    cpe:2.3:a:typo3:typo3:9.5.3
  • Typo3 » Typo3 » Version: 9.5.4
    cpe:2.3:a:typo3:typo3:9.5.4
  • Typo3 » Typo3 » Version: 9.5.5
    cpe:2.3:a:typo3:typo3:9.5.5
  • Typo3 » Typo3 » Version: 9.5.6
    cpe:2.3:a:typo3:typo3:9.5.6
  • Typo3 » Typo3 » Version: 9.5.7
    cpe:2.3:a:typo3:typo3:9.5.7
  • Typo3 » Typo3 » Version: 9.5.8
    cpe:2.3:a:typo3:typo3:9.5.8
  • Typo3 » Typo3 » Version: 9.5.9
    cpe:2.3:a:typo3:typo3:9.5.9


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