Vulnerability identifier: #VU58012

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43185

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
YouTrack
Web applications / CMS

Vendor: JetBrains s.r.o.

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper validation of HTTP headers. A remote attacker can inject arbitrary Host header and perform spoofing attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

YouTrack: 2017.1.30791 - 2021.3.22664

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External links
http://blog.jetbrains.com/blog/2021/11/08/jetbrains-security-bulletin-q3-2021

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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.