Vulnerability identifier: #VU17111

Vulnerability risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TYPO3
Web applications / CMS

Vendor: TYPO3

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in TYPO3 core API CommandUtility::checkCommand() method, available for usage for the third-party TYPO3 extensions. A remote attacker can send a specially crafted request to the affected extension and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system, however requires that a specific extension is used.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TYPO3: 9.5.0 - 9.5.3, 8.7.0 - 8.7.22

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External links
http://typo3.org/security/advisory/typo3-psa-2019-001/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.