What is CVE-2025-34402?

CVE-2025-34402 is a medium-severity vulnerability in Mailenable, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-09.

How severe is CVE-2025-34402?

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

XSS in Mailenable

CVE-2025-34402

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the FieldCc parameter of /Mondo/lang/sys/Forms/AddressBook.aspx. The FieldCc value is not properly sanitized when processed via a GET reques…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.

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.

Affected products

Mailenable — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2025-34402?: CVE-2025-34402 is a medium-severity vulnerability in Mailenable, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-09.
How severe is CVE-2025-34402?: Medium severity. CVSS v3 base score is 6.1 out of 10.