Vulnerability · Published Dec 9, 2025 · Assigned by VulnCheck

CVE-2025-34408MailEnable < 10.54 Reflected XSS in Added Parameter of MAI/AddRecipientsResult.aspx

Medium 5.3

In plain English

A medium-severity cross-site scripting in MailEnable from MailEnable. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.5%top 57.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the Added parameter of /Mondo/lang/sys/Forms/MAI/AddRecipientsResult.aspx. The Added 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.

Affected products (as reported)

Vendor	Product	Versions
MailEnable	MailEnable	0 – before 10.54

Weakness: CWE-79 · 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

References

https://mailenable.com/Standard-ReleaseNotes.txt release-notes, patch
https://www.mailenable.com/ product
https://www.vulncheck.com/advisories/mailenable-reflected-xss-in-added-parameter-of-mai-addrecipientsresult-aspx third-party-advisory