CVE-2023-24842Network attack vector

Email-content disclosure via unchecked URL identifiers

Published Mar 27, 2023 · Updated Feb 19, 2025

Broken access control in HGiga MailSherlock 4.5 allows remote attackers to read parts of other users' email through crafted URLs. A mail-viewing function trusts user and mail identifiers supplied in the URL and returns matching records without enforcing ownership, exposing fields such as message subjects. No authentication or user interaction is required, and the documented consequence is limited to partial email-content disclosure.

CVSS severity5.3
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken access control in HGiga MailSherlock 4.5 allows remote attackers to read parts of other users' email through crafted URLs. A mail-viewing function trusts user and mail identifiers supplied in the URL and returns matching records without enforcing ownership, exposing fields such as message subjects. No authentication or user interaction is required, and the documented consequence is limited to partial email-content disclosure.

The record

CVE
CVE-2023-24842
Published
Mar 27, 2023
Updated
Feb 19, 2025
Vendor
HGiga
Product
MailSherlock
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=iSherlock-antispam-4.5 <=iSherlock-antispam-4.5-167
  2. Affected versionversion=iSherlock-user-4.5 <=iSherlock-user-4.5-161

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HGiga · MailSherlockversion=iSherlock-antispam-4.5 <=iSherlock-antispam-4.5-167; version=iSherlock-user-4.5 <=iSherlock-user-4.5-161

Published CVSS scores

5.3TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo