CVE-2021-39117 Cross-site scripting in Jira Data Center
Remote attackers can inject arbitrary HTML or JavaScript via custom field names in Atlassian Jira, potentially leading to session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-39117?
CVE-2021-39117 is a medium-severity cross-site scripting vulnerability in Atlassian Jira, published on 30 Aug 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The AssociateFieldToScreens page in Atlassian Jira Server and Data Center before version 8.18.0 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability via the name of a custom field.
Weakness: CWE-79
Which versions are affected by CVE-2021-39117?
It affects 2 products.
Products include Atlassian Data Center, Atlassian Jira.
How do I fix CVE-2021-39117?
No fix has been published for CVE-2021-39117 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-2021-39117 being exploited?
There is no known exploitation of CVE-2021-39117 in the wild and no public exploit code.
Other vulnerabilities in Atlassian Jira
Sources
Also known as GHSA-94j7-qfrq-rx57.