What is CVE-2023-24839?

CVE-2023-24839 is a medium-severity vulnerability in Hgiga Mailsherlock, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-03-27.

How severe is CVE-2023-24839?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Hgiga Mailsherlock

CVE-2023-24839

HGiga MailSherlock’s specific function has insufficient filtering for user input. An unauthenticated remote attacker can exploit this vulnerability to inject JavaScript, conducting a reflected XSS attack.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · 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-79 — Cross-site Scripting

References

www.twcert.org.tw/tw/cp-132-6958-e1a8e-1.html (Third Party Advisory)

Frequently asked questions

What is CVE-2023-24839?: CVE-2023-24839 is a medium-severity vulnerability in Hgiga Mailsherlock, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-03-27.
How severe is CVE-2023-24839?: Medium severity. CVSS v3 base score is 6.1 out of 10.