What is CVE-2017-18091?

CVE-2017-18091 is a medium-severity vulnerability in Atlassian Crucible, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-02-16.

How severe is CVE-2017-18091?

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

XSS in Atlassian Crucible

CVE-2017-18091

The admin backupprogress action in Atlassian Fisheye and Crucible before version 4.4.3 (the fixed version for 4.4.x) and before 4.5.0 allows remote attackers with administrative privileges to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the filename of a backup.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-02-16 · 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: 0.008 (56.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Atlassian Crucible
Atlassian Fisheye
Atlassian Fisheye And Crucible — versions prior to 4.5.0, prior to 4.4.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jira.atlassian.com/browse/FE-7006 (Vendor Advisory)
jira.atlassian.com/browse/CRUC-8173 (Vendor Advisory)
www.securityfocus.com/bid/103079 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-18091?: CVE-2017-18091 is a medium-severity vulnerability in Atlassian Crucible, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-02-16.
How severe is CVE-2017-18091?: Medium severity. CVSS v3 base score is 4.8 out of 10.