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Vulnerability record · CVE-2020-26105 · published 25 September 2020

CVE-2020-26105: Cpanel improper authentication vulnerability

Cpanel · Cpanel

In cPanel before 88.0.3, insecure chkservd test credentials are used on a templated VM (SEC-554).

9.8 CVSS 3.1 Critical EPSS 1.4% · top 28.3% CWE-287 · Improper authentication
9.8CVSS 3.1 base score, v2 5.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In cPanel before 88.0.3, insecure chkservd test credentials are used on a templated VM (SEC-554).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.cpanel.net/changelogs/88-change-log/ Release NotesVendor Advisory
https://docs.cpanel.net/changelogs/88-change-log/ Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-41940cPanel and WHM login flow authentication bypasscPanel, WHM and WP Squared versions after 11.40 contain a missing-authentication flaw in the login flow (CWE-306) that lets unauthenticated remote at…KEVEPSS 99%analysed10.0CVE-2004-1769Cpanel vulnerabilityThe "Allow cPanel users to reset their password via email" feature in cPanel 9.1.0 build 34 and earlier, including 8.x, allows remote attackers to ex…EPSS 35%10.0CVE-2004-1770Cpanel vulnerabilityThe login page for cPanel 9.1.0, and possibly other versions, allows remote attackers to execute arbitrary code via shell metacharacters in the user …EPSS 10%10.0CVE-2003-1425Cpanel improper input validation vulnerabilityguestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter.EPSS 11%9.8CVE-2020-26108Cpanel vulnerabilitycPanel before 88.0.13 mishandles file-extension dispatching, leading to code execution (SEC-488).EPSS 2.5%9.8CVE-2020-26098Cpanel vulnerabilitycPanel before 88.0.3 mishandles the Exim filter path, leading to remote code execution (SEC-485).EPSS 3.0%9.8CVE-2020-26100Cpanel vulnerabilitychsh in cPanel before 88.0.3 allows a Jailshell escape (SEC-497).EPSS 1.6%9.8CVE-2020-26101Cpanel improper authentication vulnerabilityIn cPanel before 88.0.3, insecure RNDC credentials are used for BIND on a templated VM (SEC-549).EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2020-26105), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.