What is CVE-2015-8398?

CVE-2015-8398 is a medium-severity vulnerability in Atlassian Confluence, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2016-04-11.

How severe is CVE-2015-8398?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Atlassian Confluence

CVE-2015-8398

Cross-site scripting (XSS) vulnerability in Atlassian Confluence before 5.8.17 allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to rest/prototype/1/session/check.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2016-04-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.021 (81.8th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Atlassian Confluence

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/archive/1/537232/100/0/threaded (mailing-list)
www.exploit-db.com/exploits/39170/ (exploit)

Frequently asked questions

What is CVE-2015-8398?: CVE-2015-8398 is a medium-severity vulnerability in Atlassian Confluence, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2016-04-11.
How severe is CVE-2015-8398?: Medium severity. CVSS v3 base score is 6.1 out of 10.