What is CVE-2017-16633?

CVE-2017-16633 is a medium-severity vulnerability in Joomla Joomla\!, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-11-10.

How severe is CVE-2017-16633?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Joomla Joomla\!

CVE-2017-16633

In Joomla! before 3.8.2, a logic bug in com_fields exposed read-only information about a site's custom fields to unauthorized users.

Vulnerability class: Information Disclosure

Published 2017-11-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.017 (76.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Joomla Joomla\!

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

developer.joomla.org/security-centre/715-20171103-core-information-disclosure.h… (Patch, Vendor Advisory)
www.securityfocus.com/bid/101702 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1039757 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-16633?: CVE-2017-16633 is a medium-severity vulnerability in Joomla Joomla\!, classified under Information Disclosure. CVSS score: 4.3/10. Published 2017-11-10.
How severe is CVE-2017-16633?: Medium severity. CVSS v3 base score is 4.3 out of 10.