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TI-2021-17953 Aliases CVE-2021-41114GHSA-m2jh-fxw4-gphm

HTTP Host Header Injection in Request Handling in Typo3

Priority LOW 27CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

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 to any value, even in a name-based virtual hosts environment. This vulnerability is the same as described in TYPO3-CORE-SA-2014-001 (CVE-2014-3941). A regression, introduced during TYPO3 v11 development, led to this situation. The already existing setting $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] (used as an effective mitigation strategy in previous TYPO3 versions) was not evaluated anymore, and reintroduced the vulnerability.

Why it matters now

EPSS 0.01221 68th percentileScored 2026-11-07
Fix Fixed typo3 (TYPO3): 11.5.0typo3/cms-core (Packagist): 11.5.0+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
TYPO3typo311.0.0 to before 11.5.011.5.0Patch availableCNA
—typo3/cms-core (Packagist)11.0.0 to before 11.5.011.5.0Patch availableGHSA-m2jh-fxw4-gphm
—typo3/cms (Packagist)11.0.0 to before 11.5.011.5.0Patch availableGHSA-m2jh-fxw4-gphm
  • typo3 VendorTYPO3 Affected 11.0.0 to before 11.5.0 Fixed in 11.5.0 Patch available CNA
  • typo3/cms-core (Packagist) Vendor— Affected 11.0.0 to before 11.5.0 Fixed in 11.5.0 Patch available GHSA-m2jh-fxw4-gphm
  • typo3/cms (Packagist) Vendor— Affected 11.0.0 to before 11.5.0 Fixed in 11.5.0 Patch available GHSA-m2jh-fxw4-gphm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*11.0.0 to before 11.5.0VulnerableTYPO3
  • cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:* Versions 11.0.0 to before 11.5.0 Vulnerable ·TYPO3

Remediation

  • Fix · CNA typo3 (TYPO3) Fixed in 11.5.0
  • Fix · GHSA-m2jh-fxw4-gphm typo3/cms-core (Packagist) Fixed in 11.5.0 Advisory →
  • Fix · GHSA-m2jh-fxw4-gphm typo3/cms (Packagist) Fixed in 11.5.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41114
  2. 2026-10-03 Alias added: GHSA-m2jh-fxw4-gphm

References

Patch 1

Advisory 4

Other 3

  • TI-2023-10314 Persisted Cross-Site Scripting in Frontend Rendering in typo3 CVSS 3.1HIGH 8.8
  • TI-2010-03538 The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3… CVSS 2.0HIGH 7.1
  • TI-2009-00775 The jumpUrl mechanism in class.tslib_fe.php in TYPO3 3.3.x through 3.8.x, 4.0 before… CVSS 2.0MEDIUM 5.0
  • TI-2009-00241 The Indexed Search Engine (indexed_search) system extension in TYPO3 4.0.0 through 4.0.9… CVSS 2.0HIGH 10.0
  • TI-2020-08940 Improperly Controlled Modification of Dynamically-Determined Object Attributes in TYPO3 CMS CVSS 3.1CRITICAL 10.0
  • TI-2011-03994 Improper authentication in TYPO3 CVSS 3.1CRITICAL 9.8
See all 217 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences