What is CVE-2018-11331?

CVE-2018-11331 is a critical-severity vulnerability in Pluck-Cms Pluck, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-05-21.

How severe is CVE-2018-11331?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Pluck-Cms Pluck

CVE-2018-11331

An issue was discovered in Pluck before 4.7.6. Remote PHP code execution is possible because the set of disallowed filetypes for uploads in missing some applicable ones such as .phtml and .htaccess.

Vulnerability class: Unrestricted File Upload

Published 2018-05-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (82.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.022 · change: -0.000

Affected products

Pluck-Cms Pluck

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/pluck-cms/pluck/issues/58 (Patch, Third Party Advisory, Issue Tracking)
github.com/pluck-cms/pluck/commit/8f6541e60c9435e82e9c531a20cb3c218d36976e (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-11331?: CVE-2018-11331 is a critical-severity vulnerability in Pluck-Cms Pluck, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-05-21.
How severe is CVE-2018-11331?: Critical severity. CVSS v3 base score is 9.8 out of 10.