CVE-2018-20233

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-01-18 · updated 2026-06-17
Weakness: CWE-611

Description

The Upload add-on resource in Atlassian Universal Plugin Manager before version 2.22.14 allows remote attackers who have system administrator privileges to read files, make network requests and perform a denial of service attack via an XML External Entity vulnerability in the parsing of atlassian plugin xml files in an uploaded JAR.

Affected products

Atlassian Universal Plugin Manager: before 2.22.14 — fixed in 2.22.14

How to fix

Upgrade to a fixed version: Atlassian Universal Plugin Manager 2.22.14. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/106661
https://ecosystem.atlassian.net/browse/UPM-5964
http://www.securityfocus.com/bid/106661
https://ecosystem.atlassian.net/browse/UPM-5964

Get alerted when CVE-2018-20233 or the next vulnerability affects your stack