CVE-2025-34402
MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the FieldCc parameter of /Mondo/lang/sys/Forms/AddressBook.aspx. The FieldCc value is not properly sanitized when processed via a GET request and is reflected inside a <script> block in the JavaScript variable var CCFieldProvided. By supplying a crafted payload that terminates the existing LoadCurAddresses() function, inserts attacker-controlled script, and comments out remaining code, a remote attacker can execute arbitrary JavaScript in a victim’s browser when the victim attempts to send an email. Successful exploitation can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user.
- Score
- CVSS 3.1 6.1 Medium
- Status
- Analyzed - disclosure@vulncheck.com
- Published
- 2025-12-09
- Last modified
- 2026-10-19
- Weaknesses
- CWE-79
Affected products
References
- https://mailenable.com/Standard-ReleaseNotes.txt
- https://www.mailenable.com/
- https://www.vulncheck.com/advisories/mailenable-reflected-xss-in-fieldcc-parameter-of-addressbook-aspx
