CVE-2026-126780

HIGH 7.2

Webmin through 2.670 Privilege Escalation via acl/save_group.cgi

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

Webmin through 2.670 contains a privilege escalation vulnerability in acl/save_group.cgi that allows delegated administrators to grant unauthorized modules by submitting arbitrary module lists in the mod parameter. Attackers with Webmin Users module access can create or edit groups holding modules like Command Shell and assign themselves membership to execute commands as root.

CWE	CWE-269
Vendor	webmin
Product	webmin
Published	Nov 11, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

webmin / webmin

0 ≤ 2.670

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/webmin/webmin/commit/c861e308f4ee4cff1795ccc7621fc75623e1bb90 github.com: https://github.com/webmin/webmin/commit/be54ba38c3b86a3647a62327e1de81d5d0db098a github.com: https://github.com/webmin/webmin/blob/2.670/acl/save_group.cgi#L83 vulncheck.com: https://www.vulncheck.com/advisories/webmin-through-2.670-privilege-escalation-via-acl-save-group-cgi

Credits

Zachariah Mithani (AploSec)