CVE-2023-27641Public exploitNetwork attack vector

Reflected XSS via unsanitized REPORT parameter

Published Mar 5, 2023 · Updated Mar 6, 2025

Reflected XSS in wa.exe in L-Soft LISTSERV before 17.0 allows remote attackers to execute script via a crafted REPORT URL. wa.exe reflects the REPORT value into HTML without adequate sanitization, letting input close a tag after z and inject JavaScript before a. A victim must follow the crafted link; injected JavaScript then runs in the LISTSERV site's browser origin and can read or modify session-accessible data.

CVSS severity6.1
Medium
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in wa.exe in L-Soft LISTSERV before 17.0 allows remote attackers to execute script via a crafted REPORT URL. wa.exe reflects the REPORT value into HTML without adequate sanitization, letting input close a tag after z and inject JavaScript before a. A victim must follow the crafted link; injected JavaScript then runs in the LISTSERV site's browser origin and can read or modify session-accessible data.

The record

CVE
CVE-2023-27641
Published
Mar 5, 2023
Updated
Mar 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo