CVE-2021-39111

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-30 · updated 2026-06-17
Weakness: CWE-79

Description

The Editor plugin in Atlassian Jira Server and Data Center before version 8.5.18, from 8.6.0 before 8.13.10, and from version 8.14.0 before 8.18.2 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in the handling of supplied content such as from a PDF when pasted into a field such as the description field.

Affected products

Atlassian Data Center: before 8.5.18 — fixed in 8.5.18
Atlassian Jira: before 8.5.18 — fixed in 8.5.18
Atlassian Jira: from 8.6.0 before 8.13.10; from 8.14.0 before 8.18.2 — fixed in 8.13.10, 8.18.2
Atlassian Jira: from 8.6.0 before 8.13.10; from 8.14.0 before 8.18.2 — fixed in 8.13.10, 8.18.2

How to fix

Upgrade to a fixed version: Atlassian Data Center 8.5.18; Atlassian Jira 8.5.18; Atlassian Jira 8.13.10, 8.18.2; Atlassian Jira 8.13.10, 8.18.2. Check the vendor advisory for mitigations.

References

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