What is CVE-2018-16397?

CVE-2018-16397 is a medium-severity vulnerability in Limesurvey, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 4.9/10. Published 2018-09-03.

How severe is CVE-2018-16397?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Arbitrary file upload in Limesurvey

CVE-2018-16397

In LimeSurvey before 3.14.7, an admin user can leverage a "file upload" question to read an arbitrary file,

Vulnerability class: Unrestricted File Upload

Published 2018-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Limesurvey

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/LimeSurvey/LimeSurvey/blob/3be9b41e76826b57f5860d18d93b23f47d59d2e4/… (Third Party Advisory)

Frequently asked questions

What is CVE-2018-16397?: CVE-2018-16397 is a medium-severity vulnerability in Limesurvey, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 4.9/10. Published 2018-09-03.
How severe is CVE-2018-16397?: Medium severity. CVSS v3 base score is 4.9 out of 10.