CVE-2021-41114— HTTP Host Header Injection in Request Handling in Typo3
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I. Basic Information for CVE-2021-41114
Vulnerability Information
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Vulnerability Title
HTTP Host Header Injection in Request Handling in Typo3
Source: NVD (National Vulnerability Database)
Vulnerability 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 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
TYPO3 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3是瑞士TYPO3（Typo3）协会的一套免费开源的内容管理系统(框架)(CMS/CMF)。 TYPO3 v11版本存在安全漏洞，该漏洞源于缺少对于HTTP主机报头的有效验证，TYPO3 CMS很容易受到主机欺骗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-41114
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- https://typo3.org/security/advisory/typo3-core-sa-2021-015x_refsource_MISC
- https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphmx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-41114
IV. Related Vulnerabilities
Same product: typo3
- CVE-2025-47941
TYPO3 Has Broken Authentication in Backend MFA - CVE-2025-47940
TYPO3 CMS Vulnerable to Privilege Escalation to System Maint - CVE-2025-47939
TYPO3 CMS Vulnerable to Unrestricted File Upload in File Abs - CVE-2025-47938
TYPO3 Vulnerable to Unverified Password Change for Backend U - CVE-2025-47937
TYPO3 Vulnerable to Information Disclosure via DBAL Restrict
Same vendor: TYPO3
- CVE-2026-6553
TYPO3 CMS Stores Cleartext Password in User Settings Module - CVE-2026-4208
Authentication Bypass in extension "E-Mail MFA Provider" (mf - CVE-2026-4202
Broken Access Control in extension "Redirect Tab" - CVE-2026-1323
Insecure Deserialization in extension "Mailqueue" (mailqueue - CVE-2026-0895
Insecure Deserialization in extension "Mailqueue" (mailqueue
Same weakness: CWE-20
V. Comments for CVE-2021-41114
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