CVE Catalog

CVE-2025-34404

MediumCVSS 6.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.40%

32th percentile - higher than 32% of all known CVEs

Summary

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the InstanceScope parameter of /Mondo/lang/sys/Forms/CAL/compose.aspx. The InstanceScope value is not properly sanitized and is reflected inside a <script> block in the JavaScript variable var gInstanceScope, allowing a remote attacker to execute arbitrary JavaScript in a victim's browser.

Risk Assessment

A remote attacker can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user. This may lead to account takeover and compromise of the organization's security.

Recommendation

Upgrade MailEnable to version 10.54 or later. Additionally, mark session cookies as HttpOnly and implement a Content Security Policy to mitigate XSS impact.

Other vulnerabilities in MailEnable

See all
Original NVD description (English source)

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the InstanceScope parameter of /Mondo/lang/sys/Forms/CAL/compose.aspx. The InstanceScope value is not properly sanitized when processed via a GET request and is reflected inside a <script> block in the JavaScript variable var gInstanceScope. By supplying a crafted payload that terminates the existing PageLoad() function, inserts attacker-controlled script, and comments out remaining code, a remote attacker can execute arbitrary JavaScript in a victim’s browser. Successful exploitation can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS