What is CVE-2016-10821?

CVE-2016-10821 is a medium-severity vulnerability in Cpanel, classified under CWE-255. CVSS score: 6.5/10. Published 2019-08-01.

How severe is CVE-2016-10821?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Cpanel

CVE-2016-10821

In cPanel before 55.9999.141, Scripts/addpop reveals a command-line password in a process list (SEC-75).

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-255

References

documentation.cpanel.net/display/CL/56+Change+Log (Product, Release Notes)
news.cpanel.com/cpanel-tsr-2016-0002-full-disclosure/ (Vendor Advisory)

Frequently asked questions

What is CVE-2016-10821?: CVE-2016-10821 is a medium-severity vulnerability in Cpanel, classified under CWE-255. CVSS score: 6.5/10. Published 2019-08-01.
How severe is CVE-2016-10821?: Medium severity. CVSS v3 base score is 6.5 out of 10.