What is CVE-2018-11678?

CVE-2018-11678 is a critical-severity vulnerability in Monstra Cms, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-06-05.

How severe is CVE-2018-11678?

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

Improper input validation in Monstra Cms

CVE-2018-11678

plugins/box/users/users.plugin.php in Monstra CMS 3.0.4 allows Login Rate Limiting Bypass via manipulation of the login_attempts cookie.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-06-05 · 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 (76.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.0% 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

Monstra Cms — versions 3.0.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

abdilahrf.github.io/login-rate-limiting-bypass (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-11678?: CVE-2018-11678 is a critical-severity vulnerability in Monstra Cms, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-06-05.
How severe is CVE-2018-11678?: Critical severity. CVSS v3 base score is 9.8 out of 10.