What’s Vulnerable › Vulnerabilities

CVE-2023-27641

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-03-05 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• Lsoft Listserv: before 17.0 — fixed in 17.0

How to fix

Upgrade to a fixed version: Lsoft Listserv 17.0. Check the vendor advisory for mitigations.

References

• https://github.com/hosakauk/exploits/blob/master/listserv_report_xss.MD
• https://github.com/hosakauk/exploits/blob/master/listserv_report_xss.MD

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