What’s Vulnerable › Vulnerabilities

CVE-2026-32852: MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-23 · updated 2026-06-17
• Weakness: CWE-79

Description

MailEnable versions prior to 10.55 contain a reflected cross-site scripting vulnerability in the webmail interface that allows remote attackers to execute arbitrary JavaScript in a victim's browser by crafting a malicious URL. Attackers can inject malicious code through the StartDate parameter in the FreeBusy.aspx form, which is not properly sanitized before being embedded into dynamically generated JavaScript.

Affected products

• MailEnable: before 10.55 — fixed in 10.55

How to fix

Upgrade to a fixed version: MailEnable 10.55. Check the vendor advisory for mitigations.

References

• https://karmainsecurity.com/KIS-2026-05
• https://mailenable.com/Standard-ReleaseNotes.txt
• https://www.mailenable.com/
• https://www.mailenable.com/rss/article.asp?Source=RSSADMIN&ID=MAILENABLEVERSION1055
• https://www.vulncheck.com/advisories/mailenable-reflected-xss-via-freebusy-aspx-startdate-parameter

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