CVE-2020-4022

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-01 · updated 2026-06-17
Weakness: CWE-79

Description

The attachment download resource in Atlassian Jira Server and Data Center before 8.5.5, and from 8.6.0 before 8.8.2, and from 8.9.0 before 8.9.1 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability issue attachments with a mixed multipart content type.

Affected products

Atlassian Jira: before 8.5.5 — fixed in 8.5.5
Atlassian Jira: from 8.6.0 before 8.8.2; from 8.9.0 before 8.9.1 — fixed in 8.8.2, 8.9.1
Atlassian Jira: from 8.6.0 before 8.8.2; from 8.9.0 before 8.9.1 — fixed in 8.8.2, 8.9.1
Atlassian Jira Software Data Center: before 8.5.5 — fixed in 8.5.5

How to fix

Upgrade to a fixed version: Atlassian Jira 8.5.5; Atlassian Jira 8.8.2, 8.9.1; Atlassian Jira 8.8.2, 8.9.1; Atlassian Jira Software Data Center 8.5.5. Check the vendor advisory for mitigations.

References

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