What is CVE-2018-12491?

CVE-2018-12491 is a critical-severity vulnerability in Phpok, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-06-15.

How severe is CVE-2018-12491?

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

Arbitrary file upload in Phpok

CVE-2018-12491

PHPOK 4.9.032 has an arbitrary file upload vulnerability in the import_f function in framework/admin/modulec_control.php, as demonstrated by uploading a .php file within a .php.zip archive, a similar issue to CVE-2018-8944.

Vulnerability class: Unrestricted File Upload

Published 2018-06-15 · 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: 0.017 (75.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.7% 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

Phpok — versions 4.9.032

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/SukaraLin/php_code_audit_project/blob/master/phpok/Phpok 4.9.032代码审计… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-12491?: CVE-2018-12491 is a critical-severity vulnerability in Phpok, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-06-15.
How severe is CVE-2018-12491?: Critical severity. CVSS v3 base score is 9.8 out of 10.