What is CVE-2018-18891?

CVE-2018-18891 is a high-severity vulnerability in 1234n Minicms, classified under Improper Authentication. CVSS score: 7.5/10. Published 2018-11-01.

How severe is CVE-2018-18891?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in 1234n Minicms

CVE-2018-18891

MiniCMS 1.10 allows file deletion via /mc-admin/post.php?state=delete&delete= because the authentication check occurs too late.

Vulnerability class: Broken Authentication

Published 2018-11-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

1234n Minicms — versions 1.10

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/AvaterXXX/MiniCms/blob/master/Authentication and Information Exposur… (Exploit, Third Party Advisory)
www.patec.cn/newsshow.php (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18891?: CVE-2018-18891 is a high-severity vulnerability in 1234n Minicms, classified under Improper Authentication. CVSS score: 7.5/10. Published 2018-11-01.
How severe is CVE-2018-18891?: High severity. CVSS v3 base score is 7.5 out of 10.