CVE-2019-20897

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-13 · updated 2026-06-17
Weakness: CWE-434

Description

The avatar upload feature in affected versions of Atlassian Jira Server and Data Center allows remote attackers to achieve Denial of Service via a crafted PNG file. The affected versions are before version 8.5.4, from version 8.6.0 before 8.6.2, and from version 8.7.0 before 8.7.1.

Affected products

Atlassian Jira: before 8.5.4 — fixed in 8.5.4
Atlassian Jira: from 8.6.0 before 8.6.2; from 8.7.0 before 8.7.1 — fixed in 8.6.2, 8.7.1
Atlassian Jira: from 8.6.0 before 8.6.2; from 8.7.0 before 8.7.1 — fixed in 8.6.2, 8.7.1
Atlassian Jira Software Data Center: before 8.5.4 — fixed in 8.5.4

How to fix

Upgrade to a fixed version: Atlassian Jira 8.5.4; Atlassian Jira 8.6.2, 8.7.1; Atlassian Jira 8.6.2, 8.7.1; Atlassian Jira Software Data Center 8.5.4. Check the vendor advisory for mitigations.

References

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