#VU18395 Cross-site scripting in Jira Software - CVE-2019-3400

Vulnerability identifier: #VU18395

Vulnerability risk: Low

CVSSv4.0: 1.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-3400

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 when processing data passed via the "jql" HTTP GET parameter to "/rest/gadget/1.0/issueTable/jql" URL. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code 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.

Exploitation example:

http://[host]/rest/gadget/1.0/issueTable/jql?jql=XSS

Mitigation
Install update from vendor's website.

Vulnerable software versions

Jira Software: 7.8.2 - 7.8.5, 7.9.0 - 7.9.3, 7.10.0 - 7.13.1, 8.0.0-m0025 - 8.0.1

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External links
https://jira.atlassian.com/browse/JRASERVER-69245

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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. However, proof of concept for this vulnerability is available.