#VU31021 Improper Neutralization of Special Elements in Output Used by a Downstream Component in TeamCity - CVE-2019-12843

Vulnerability identifier: #VU31021

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12843

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TeamCity
Web applications / CRM systems

Vendor: JetBrains s.r.o.

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

A possible stored JavaScript injection requiring a deliberate server administrator action was detected. The issue was fixed in JetBrains TeamCity 2018.2.3.

Mitigation
Install update from vendor's website.

Vulnerable software versions

TeamCity: 2018.2.1 - 2018.2.2

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External links
https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/

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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.