CVE-2019-20102

Name: CVE-2019-20102
Creator: NVD / NIST
Published: 2020-04-22T04:15:10.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2019-20102 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The attachment-uploading feature in Atlassian Confluence Server from version 6.14.0 through version 6.14.3, and version 6.15.0 before version 6.15.5 allows remote attackers to achieve stored cross-site- scripting (SXSS) via a malicious attachment with a modified `mimeType` parameter.. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

The attachment-uploading feature in Atlassian Confluence Server from version 6.14.0 through version 6.14.3, and version 6.15.0 before version 6.15.5 allows remote attackers to achieve stored cross-site- scripting (SXSS) via a malicious attachment with a modified `mimeType` parameter.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.08%

61.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Atlassian	Confluence Server	>= 6.14.0, <= 6.14.3
Atlassian	Confluence Server	>= 6.15.0, < 6.15.5

References

https://jira.atlassian.com/browse/CONFSERVER-59358Permissions Required
https://jira.atlassian.com/browse/CONFSERVER-59358Permissions Required

Timeline

Published: Apr 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20102?

How severe is CVE-2019-20102?

CVE-2019-20102 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20102?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20102?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST