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Servers and applications

CVE-2021-41114

HTTP Host Header Injection in Request Handling

Severity
Medium 5.3
Published
5 Oct 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
11.5.0
Also known as
GHSA-m2jh-fxw4-gphm
Sources
NVD, Project advisories (GitHub)

Description

TYPO3 is an open source PHP based web content management system released under the GNU GPL. It has been discovered that TYPO3 CMS is susceptible to host spoofing due to improper validation of the HTTP Host header. TYPO3 uses the HTTP Host header, for example, to generate absolute URLs during the frontend rendering process. Since the host header itself is provided by the client, it can be forged…

Affected software

SoftwareAffected versions
TYPO3Servers and applications · cpe:a:typo3:typo3
  • From 11.0.0 before 11.5.0
TYPO3Servers and applications · github:typo3/typo3
  • From 11.0.0 before 11.5.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-41114
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-41114
  • GitHub Advisory Database https://github.com/advisories/GHSA-m2jh-fxw4-gphm
  • github.com https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphm