CVE-2023-27641 Cross-site scripting in n/a

Medium 6.1 Published 5 Mar 2023 Updated 6 Mar 2025

An attacker can execute arbitrary scripts in the victim's browser via a crafted URL in L-Soft LISTSERV, potentially leading to session hijacking or data theft.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-27641?

CVE-2023-27641 is a medium-severity cross-site scripting vulnerability in n/a, published on 5 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The REPORT (after z but before a) parameter in wa.exe in L-Soft LISTSERV 16.5 before 17 allows an attacker to conduct XSS attacks via a crafted URL.

Weakness: CWE-79

Which versions are affected by CVE-2023-27641?

It affects 1 product.

Products include Lsoft Listserv.

How do I fix CVE-2023-27641?

No fix has been published for CVE-2023-27641 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-27641 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27641 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-83w9-cx5r-7hgx.