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

What is CVE-2026-32852?

CVE-2026-32852 is a medium-severity cross-site scripting vulnerability in Mailenable Mailenable, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-32852?

It affects 1 product.

Products include Mailenable Mailenable.

How do I fix CVE-2026-32852?

No fix has been published for CVE-2026-32852 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-32852 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32852 exists.

Other vulnerabilities in Mailenable Mailenable

• CVE-2015-9280 XML external entity in n/a Critical 10.0
• CVE-2025-44148 Cross-site scripting in n/a Critical 9.8
• CVE-2019-12924 XML external entity in n/a Critical 9.8
• CVE-2015-9278 MailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB a Critical 9.8
• CVE-2015-9277 Path traversal in n/a Critical 9.1

All Mailenable Mailenable vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cwm4-pqjw-r7wj.