What is CVE-2017-18084?

CVE-2017-18084 is a medium-severity vulnerability in Atlassian Confluence, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-02-02.

How severe is CVE-2017-18084?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Atlassian Confluence

CVE-2017-18084

The usermacros resource in Atlassian Confluence Server before version 6.3.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability through the description of a macro.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.7th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Atlassian Confluence — versions prior to 6.3.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jira.atlassian.com/browse/CONFSERVER-54904 (Issue Tracking, Vendor Advisory)
www.securityfocus.com/bid/103064 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-18084?: CVE-2017-18084 is a medium-severity vulnerability in Atlassian Confluence, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-02-02.
How severe is CVE-2017-18084?: Medium severity. CVSS v3 base score is 4.8 out of 10.