CVE-2018-25221 CRITICAL

CVE-2018-25221: EChat Server 3.1 Buffer Overflow via chat.ghp username Parameter

Vendor Echatserver
Product EChat Server
Weakness CWE-787
Published March 28, 2026
Last update March 30, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 28, 2026 CVE published
March 30, 2026 Record updated