---
id: CVE-2026-123620
title: Usermin through 2.570 OS Command Injection via Read Mail IMAP Folder Deletion
summary: >-
  Usermin through 2.570 contains an OS command injection vulnerability in the
  Read Mail module that allows authenticated users to execute commands through
  unsanitized IMAP folder names. Attackers can create a folder containing shell
  metach…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-78
vendor: webmin
product: usermin
affected:
  - usermin <= 2.570
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:00:55.708Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123620'
references:
  - url: 'https://github.com/webmin/usermin/issues/142'
    label: 'GitHub Issue #142'
  - url: 'https://github.com/webmin/usermin'
  - url: >-
      https://github.com/webmin/usermin/commit/8a45420282ff04c943f05d9241a3c55afb9bca79
    label: Fix commit 8a45420
  - url: >-
      https://github.com/webmin/usermin/blob/2.570/mailbox/mailbox-lib.pl#L1031-L1040
    label: delete_folder in mailbox-lib.pl
  - url: 'https://hackmd.io/@leediay/H144QKY6zl'
    label: Researcher write-up
  - url: >-
      https://www.vulncheck.com/advisories/usermin-through-2.570-os-command-injection-via-read-mail-imap-folder-deletion
    label: >-
      VulnCheck Advisory: Usermin through 2.570 OS Command Injection via Read
      Mail IMAP Folder Deletion
tags:
  - cve.org
ingestedAt: '2026-11-06T15:54:04.081Z'
epss: 0.01376
epssPercentile: 0.72206
---

## Overview

Usermin through 2.570 contains an OS command injection vulnerability in the Read Mail module that allows authenticated users to execute commands through unsanitized IMAP folder names. Attackers can create a folder containing shell metacharacters via an external IMAP client, then delete it in Usermin to run commands as their system account, bypassing webmail-only restrictions.

## Affected

- `usermin <= 2.570`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.