CVE-2025-34409: MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the Failed…
CVE-2025-34409 · Severity: medium · CVSS 6.1 · Published 2025-12-09
MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the Failed parameter of /Mondo/lang/sys/Forms/MAI/AddRecipientsResult.aspx. The Failed value is not properly sanitized when processed via a GET request and is reflected in the response, allowing an attacker to break out of existing markup and inject arbitrary script. A remote attacker can supply a crafted payload that closes an existing HTML list element, 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.
No. Junglewise Threat Intelligence has no report of CVE-2025-34409 being exploited in the wild.
How severe is CVE-2025-34409?
Medium severity, with a CVSS score of 6.1, published 9 December 2025.
Which products and versions are affected?
Mailenable. The advisory does not name versions.
Is there a fix for CVE-2025-34409?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-34409?
Check whether you run Mailenable. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.