What is CVE-2023-24842?

CVE-2023-24842 is a medium-severity vulnerability in Hgiga Mailsherlock, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2023-03-27.

How severe is CVE-2023-24842?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Hgiga Mailsherlock

CVE-2023-24842

HGiga MailSherlock has vulnerability of insufficient access control. An unauthenticated remote user can exploit this vulnerability to access partial content of another user’s mail by changing user ID and mail ID within URL.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2023-03-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Hgiga Mailsherlock — versions iSherlock-user-4.5, iSherlock-antispam-4.5
Hgiga Oaklouds Mailsherlock — versions 4.5

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

www.twcert.org.tw/tw/cp-132-6961-12444-1.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-24842?: CVE-2023-24842 is a medium-severity vulnerability in Hgiga Mailsherlock, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2023-03-27.
How severe is CVE-2023-24842?: Medium severity. CVSS v3 base score is 5.3 out of 10.