What is CVE-2018-12045?

CVE-2018-12045 is a critical-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-06-08.

How severe is CVE-2018-12045?

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

Arbitrary file upload in Dedecms

CVE-2018-12045

DedeCMS through V5.7SP2 allows arbitrary file upload in dede/file_manage_control.php via a dede/file_manage_view.php?fmdo=upload request with an upfile1 parameter, as demonstrated by uploading a .php file.

Vulnerability class: Unrestricted File Upload

Published 2018-06-08 · 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: 0.014 (71.0th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Dedecms — versions 5.7

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/SukaraLin/php_code_audit_project/blob/master/dedecms/dedecms v5.7 sp… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-12045?: CVE-2018-12045 is a critical-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2018-06-08.
How severe is CVE-2018-12045?: Critical severity. CVSS v3 base score is 9.8 out of 10.