What is CVE-2016-10803?

CVE-2016-10803 is a high-severity vulnerability in Cpanel, classified under CRLF Injection. CVSS score: 7.5/10. Published 2019-08-07.

How severe is CVE-2016-10803?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cpanel

CVE-2016-10803

cPanel before 57.9999.105 allows newline injection via LOC records (CPANEL-6923).

Vulnerability class: CRLF Injection

Published 2019-08-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

documentation.cpanel.net/display/CL/58+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2016-10803?: CVE-2016-10803 is a high-severity vulnerability in Cpanel, classified under CRLF Injection. CVSS score: 7.5/10. Published 2019-08-07.
How severe is CVE-2016-10803?: High severity. CVSS v3 base score is 7.5 out of 10.