What is CVE-2018-1000658?

CVE-2018-1000658 is a high-severity vulnerability in Limesurvey, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2018-09-06.

How severe is CVE-2018-1000658?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Limesurvey

CVE-2018-1000658

LimeSurvey version prior to 3.14.4 contains a file upload vulnerability in upload functionality that can result in an attacker gaining code execution via webshell. This attack appear to be exploitable via an authenticated user uploading a zip archive which can contains malicious php files that can be called under certain circumstances. This vulnerability appears to have been fixed in after commit 91d143230eb357260a19c8424b3005deb49a47f7 / version 3.14.4.

Vulnerability class: Unrestricted File Upload

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% 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

Limesurvey

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/LimeSurvey/LimeSurvey/commit/91d143230eb357260a19c8424b3005deb49a47f7 (Patch, Third Party Advisory)
github.com/LimeSurvey/LimeSurvey/commit/20fc85edccc80e7e7f162613542792380c44446a (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1000658?: CVE-2018-1000658 is a high-severity vulnerability in Limesurvey, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2018-09-06.
How severe is CVE-2018-1000658?: High severity. CVSS v3 base score is 8.8 out of 10.