CVE-2018-20824 Cross-site scripting in Jira

What is CVE-2018-20824?

CVE-2018-20824 is a medium-severity cross-site scripting vulnerability in Atlassian Jira, published on 3 May 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The WallboardServlet resource in Jira before version 7.13.1 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the cyclePeriod parameter.

Weakness: CWE-79

Which versions are affected by CVE-2018-20824?

It affects 1 product.

Products include Atlassian Jira.

How do I fix CVE-2018-20824?

No fix has been published for CVE-2018-20824 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-20824 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20824 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in Atlassian Jira

• CVE-2020-14172 Deserialization in Jira Server Critical 9.8
• CVE-2019-20409 Code injection in Jira Server Critical 9.8
• CVE-2017-5983 Deserialization in n/a Critical 9.8
• CVE-2010-1165 Code injection in n/a Critical 9.0
• CVE-2016-4319 Cross-site request forgery in Atlassian JIRA Server before 7.1.9 High 8.8

All Atlassian Jira vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7p7w-89xm-52j5.