EIP-2026-100845

PRE-CVE

LISTSERV 16 - 'SHOWTPL' Cross-Site Scripting

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-100845. PoCs published by Jose Carlos de Arriba.

AI-analyzed exploit summary The exploit demonstrates a cross-site scripting (XSS) vulnerability in LISTSERV 16 by injecting a malicious script via the SHOWTPL parameter in the WA.EXE endpoint. The payload executes arbitrary JavaScript in the context of the affected site, potentially leading to cookie theft or other client-side attacks.

Description

LISTSERV 16 - 'SHOWTPL' Cross-Site Scripting

Exploits (1)

exploitdb WORKING POC VERIFIED
by Jose Carlos de Arriba · textwebappscgi
https://www.exploit-db.com/exploits/37638

The exploit demonstrates a cross-site scripting (XSS) vulnerability in LISTSERV 16 by injecting a malicious script via the SHOWTPL parameter in the WA.EXE endpoint. The payload executes arbitrary JavaScript in the context of the affected site, potentially leading to cookie theft or other client-side attacks.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: LISTSERV 16
No auth needed
Prerequisites: Access to a vulnerable LISTSERV instance · Victim interaction (e.g., clicking a crafted link)
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026