What is CVE-2018-20156?

CVE-2018-20156 is a high-severity vulnerability in Designmodo Wp Maintenance Mode, classified under Improper Input Validation. CVSS score: 7.2/10. Published 2018-12-14.

How severe is CVE-2018-20156?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2018-20156 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Designmodo Wp Maintenance Mode

CVE-2018-20156

The WP Maintenance Mode plugin before 2.0.7 for WordPress allows remote authenticated "site administrator" users to execute arbitrary PHP code throughout a multisite network.

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

Published 2018-12-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Designmodo Wp Maintenance Mode

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/blog/2016/07/3-vulnerabilities-wp-maintenance-mode/ (Third Party Advisory)

Frequently asked questions

What is CVE-2018-20156?: CVE-2018-20156 is a high-severity vulnerability in Designmodo Wp Maintenance Mode, classified under Improper Input Validation. CVSS score: 7.2/10. Published 2018-12-14.
How severe is CVE-2018-20156?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2018-20156 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.