A vulnerability, which was classified as problematic, has been found in L-Soft Listserv. Affected by this issue is an unknown function of the file /scripts/wa.exe. The manipulation of the argument OK as part of a Parameter leads to a cross site scripting vulnerability (Reflected). Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

Reflected cross site scripting (XSS) in L-Soft LISTSERV before 16.5-2018a exists via the /scripts/wa.exe OK parameter.

The weakness was presented 08/26/2019 as EDB-ID 47302 as not defined exploit (Exploit-DB). The advisory is available at exploit-db.com. This vulnerability is handled as CVE-2019-15501 since 08/22/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details as well as a public exploit are known. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

After immediately, there has been an exploit disclosed. The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 16.5-2018a eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47302).

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• L-Soft

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• Listserv

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