CVE-2022-24732Network attack vector

Expired-account access via omitted PAM account check

Published Mar 9, 2022 · Updated Apr 23, 2025

Authentication bypass in foxcpp Maddy Mail Server before 0.5.4 allows remote attackers with expired PAM credentials to access mail services. The auth.pam helper validates the password but omits pam_acct_mgmt, so PAM account and password-expiration policy is never enforced. The flaw is reachable only when auth.pam is configured and grants the expired account the same mailbox and submission access as an active account.

CVSS severity6.5
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in foxcpp Maddy Mail Server before 0.5.4 allows remote attackers with expired PAM credentials to access mail services. The auth.pam helper validates the password but omits pam_acct_mgmt, so PAM account and password-expiration policy is never enforced. The flaw is reachable only when auth.pam is configured and grants the expired account the same mailbox and submission access as an active account.

The record

CVE
CVE-2022-24732
Published
Mar 9, 2022
Updated
Apr 23, 2025
Vendor
foxcpp
Product
Maddy Mail Server
Classifications
CWE-324, T1078.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 0.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

foxcpp · Maddy Mail Serverversion=< 0.5.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-324Use of a Key Past its Expiration Date
T1078.003Valid Accounts: Local Accounts

Public exploit references

No public exploit references are available in this record.

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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