What is CVE-2015-8684?

CVE-2015-8684 is a medium-severity vulnerability in Exponentcms Exponent Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-01-18.

How severe is CVE-2015-8684?

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

XSS in Exponentcms Exponent Cms

CVE-2015-8684

Exponent CMS before 2.3.7 does not properly restrict the types of files that can be uploaded, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly have other unspecified impact as demonstrated by uploading a file with an .html extension, then accessing it via the elFinder functionality.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-01-18 · 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: 0.012 (67.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Exponentcms Exponent Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/136762/Exponent-CMS-2.3.5-File-Upload-Cross-Site-… (VDB Entry, Third Party Advisory)
exponentcms.lighthouseapp.com/projects/61783/tickets/1323-exponent-cms-235-file… (Vendor Advisory)

Frequently asked questions

What is CVE-2015-8684?: CVE-2015-8684 is a medium-severity vulnerability in Exponentcms Exponent Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-01-18.
How severe is CVE-2015-8684?: Medium severity. CVSS v3 base score is 6.1 out of 10.