What’s Vulnerable › Vulnerabilities

CVE-2025-34397: MailEnable < 10.54 Reflected XSS in Message Parameter of Mobile/Compose.aspx

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-10-14
• Weakness: CWE-79

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.

Affected products

• MailEnable: before 10.54 — fixed in 10.54

How to fix

Upgrade to a fixed version: MailEnable 10.54. Check the vendor advisory for mitigations.

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

Get alerted when CVE-2025-34397 or the next vulnerability affects your stack