Vulnerability identifier: #VU21178

Vulnerability risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-8450

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jira Software
Client/Desktop applications / Other client software

Vendor: Atlassian

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the Optimization plugin. A remote authenticated attacker with permission to manage custom fields can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in the name of a custom field in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Jira Software: 8.3.0 - 8.3.4, 8.2.0 - 8.2.5, 8.1.0 - 8.1.3, 7.6.0 - 7.6.16, 8.0.0 - 8.0.3, 7.13.0 - 7.13.5, 7.12.0 - 7.12.4, 7.11.0 - 7.11.3, 7.8.0 - 7.8.5, 7.7.0 - 7.7.5, 7.5.0 - 7.5.4, 7.4.0 - 7.4.6, 7.3 - 7.3.9, 7.2.0 - 7.2.15, 7.1 - 7.1.10, 7.0 - 7.0.11, 6.1-OD-1, 6.0 - 6.0.3, 5.2.11, 4.4 - 4.4.5, 4.3 - 4.3.4, 4.2 - 4.2.4-b591, 4.1 - 4.1.2, 3.10 - 3.10.2, 3.4 - 3.4.3, 3.3 - 3.3.3, 2.6 - 2.6.1, 2.5.1 - 2.5.3, 2.4 - 2.4.1, 2.0.2, 1.4.3, 7.10.0 - 7.10.3, 7.9.0 - 7.9.3, 3.11 - 3.11.4, 3.9 - 3.9.3, 3.8 - 3.8.4, 3.7 - 3.7.4, 3.6 - 3.6.5, 3.5 - 3.5.3, 3.2 - 3.2.4, 3.1 - 3.1.2, 3.0 - 3.0.3, 2.14 - 2.14.2, 2.12 - 2.12.1, 2.10 - 2.10.4, 2.9 - 2.9.5, 2.8 - 2.8.3, 2.7.1 - 2.7.4, 6.8.0 - 6.8.2, 6.7.0 - 6.7.16, 6.6.0 - 6.6.3, 6.5.0 - 6.5.2, 6.4.0 - 6.4.14, 6.3.0 - 6.3.15, 6.2.1 - 6.2.7, 4.0 - 4.0.2, 3.13 - 3.13.5, 3.12 - 3.12.3

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External links
http://jira.atlassian.com/browse/JRASERVER-69795

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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