CVE-2021-41114
It has been discovered that TYPO3 CMS is susceptible to host spoofing due to improper validation of the HTTP Host header.
Does this matter?
Lower severity and a low EPSS score (1.22%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.22% probability · 67th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-644
- Affected
- typo3/typo3
- Source
- security-advisories@github.com
References
- https://github.com/TYPO3/typo3/commit/5cbff85506cebe343e5ae59228977547cf8e3cf4Patch, Third Party Advisory
- https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphmThird Party Advisory
- https://typo3.org/security/advisory/typo3-core-sa-2021-015Vendor Advisory
- https://github.com/TYPO3/typo3/commit/5cbff85506cebe343e5ae59228977547cf8e3cf4Patch, Third Party Advisory
- https://github.com/TYPO3/typo3/security/advisories/GHSA-m2jh-fxw4-gphmThird Party Advisory
- https://typo3.org/security/advisory/typo3-core-sa-2021-015Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.