What is CVE-2012-6449?

CVE-2012-6449 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-02-10.

How severe is CVE-2012-6449?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Cpanel

CVE-2012-6449

The clientconf.html and detailbw.html pages in x3 in cPanel & WHM 11.34.0 (build 8) have a XSS vulnerability.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-02-10 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.9th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cpanel — versions 11.34.0
Cpanel Whm — versions 11.34.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/119113/C-Panel-WHM-11.34.0-Cross-Site-Scripting.h… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2012-6449?: CVE-2012-6449 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-02-10.
How severe is CVE-2012-6449?: Medium severity. CVSS v3 base score is 5.4 out of 10.