CVE-2018-25221

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

EChat Server 3.1 contains a buffer overflow vulnerability in the chat.ghp endpoint that allows remote attackers to execute arbitrary code by supplying an oversized username parameter. Attackers can send a GET request to chat.ghp with a malicious username value containing shellcode and ROP gadgets to achieve code execution in the application context.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
EchatserverEChat Server3.1

References

Timeline

Published
Mar 28, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2018-25221: Critical severity, CVSS 9.8 | Vulnix