#VU77298 Cross-site scripting in MDaemon - CVE-2022-29976

Vulnerability identifier: #VU77298

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-29976

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MDaemon
Server applications / Mail servers

Vendor: Alt-N

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via the "bcc" parameter to "WorldClient.dll". A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MDaemon: before 22.0.0, 22.0.0

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External links
https://github.com/haxpunk1337/MDaemon-/blob/main/MDaemon%20XSS%20at%20BCC%20endpoint

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.