What is CVE-2016-10816?

CVE-2016-10816 is a high-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2019-08-01.

How severe is CVE-2016-10816?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Cpanel

CVE-2016-10816

cPanel before 57.9999.54 allows Webmail accounts to execute arbitrary code through forwarders (SEC-121).

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

Published 2019-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% 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

Cpanel

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

documentation.cpanel.net/display/CL/58+Change+Log (Product, Release Notes)
news.cpanel.com/cpanel-tsr-2016-0003-full-disclosure/ (Vendor Advisory)

Frequently asked questions

What is CVE-2016-10816?: CVE-2016-10816 is a high-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2019-08-01.
How severe is CVE-2016-10816?: High severity. CVSS v3 base score is 8.8 out of 10.