What is CVE-2016-1000156?

CVE-2016-1000156 is a critical-severity vulnerability in Mailcwp Project, classified under Command Injection. CVSS score: 9.8/10. Published 2016-12-14.

How severe is CVE-2016-1000156?

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

Is CVE-2016-1000156 known to be exploited?

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

RCE in Mailcwp Project

CVE-2016-1000156

Mailcwp remote file upload vulnerability incomplete fix v1.100

Vulnerability class: Command Injection (OS Command Injection)

Published 2016-12-14 · 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: 0.028 (86.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Mailcwp Project

Weakness classification (CWE)

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.vapidlabs.com/advisory.php (Third Party Advisory)
wordpress.org/plugins/mailcwp/ (Exploit, Not Applicable)

Frequently asked questions

What is CVE-2016-1000156?: CVE-2016-1000156 is a critical-severity vulnerability in Mailcwp Project, classified under Command Injection. CVSS score: 9.8/10. Published 2016-12-14.
How severe is CVE-2016-1000156?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-1000156 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.