CVE-2022-31138Public exploitNetwork attack vector

Authenticated code execution via evaluated Syncjob regex

Published Jul 11, 2022 · Updated Apr 22, 2025

OS command injection in mailcow: dockerized before 2022-06a allows remote authenticated users to execute arbitrary code through Syncjobs. The Sync Job custom-parameter path passes user-controlled imapsync regex options such as regexmess to Perl eval, which executes embedded Perl code. A regular mailbox account with the Syncjob ACL can save a timed job that opens a shell and can lead to domain-admin control.

CVSS severity8.8
High
EPSS probability3.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in mailcow: dockerized before 2022-06a allows remote authenticated users to execute arbitrary code through Syncjobs. The Sync Job custom-parameter path passes user-controlled imapsync regex options such as regexmess to Perl eval, which executes embedded Perl code. A regular mailbox account with the Syncjob ACL can save a timed job that opens a shell and can lead to domain-admin control.

The record

CVE
CVE-2022-31138
Published
Jul 11, 2022
Updated
Apr 22, 2025
Vendor
mailcow
Product
mailcow: dockerized
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2022-06a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

mailcow · mailcow: dockerizedversion=< 2022-06a

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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