How severe is CVE-2018-20156?

CVE-2018-20156 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20156?

CVE-2018-20156 affects Designmodo Wp Maintenance Mode. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-20156 published?

CVE-2018-20156 was published on 2018-12-14 and last updated on 2026-06-17.

CVE-2018-20156

CVE-2018-20156 is a high-severity vulnerability in Designmodo Wp Maintenance Mode with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Designmodo Wp Maintenance Mode
Published: 2018-12-14
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-20156?: CVE-2018-20156 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20156?: CVE-2018-20156 affects Designmodo Wp Maintenance Mode. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-20156 published?: CVE-2018-20156 was published on 2018-12-14 and last updated on 2026-06-17.

References

https://www.wordfence.com/blog/2016/07/3-vulnerabilities-wp-maintenance-mode/

Affected products (1)

cpe:2.3:a:designmodo:wp_maintenance_mode:*:*:*:*:*:wordpress:*:*

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