Vulnerability identifier: #VU21798

Vulnerability risk: High

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: CVE-2019-16699

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
freeCap CAPTCHA
Web applications / Modules and components for CMS

Vendor: TYPO3

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can execute arbitrary Extbase actions, resulting in remote code execution.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

freeCap CAPTCHA: 2.0.0 - 2.5.2

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External links
http://typo3.org/security/advisory/typo3-ext-sa-2019-018/

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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.