CVE-2018-25221

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.exploit-db.com/exploits/44155	Exploit
https://www.vulncheck.com/advisories/echat-server-buffer-overflow-via-chat-ghp-username-parameter	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:echatserver:easy_chat_server:*:*:*:*:*:*:*:*

History

02 Apr 2026, 19:15

Type	Values Removed	Values Added
Summary		(es) EChat Servidor 3.1 contiene una vulnerabilidad de desbordamiento de búfer en el endpoint chat.ghp que permite a atacantes remotos ejecutar código arbitrario al proporcionar un parámetro de nombre de usuario sobredimensionado. Los atacantes pueden enviar una solicitud GET a chat.ghp con un valor de nombre de usuario malicioso que contiene shellcode y gadgets ROP para lograr la ejecución de código en el contexto de la aplicación.
CPE		cpe:2.3:a:echatserver:easy_chat_server::::::::
First Time		Echatserver Echatserver easy Chat Server
References	~~() https://www.exploit-db.com/exploits/44155 -~~	() https://www.exploit-db.com/exploits/44155 - Exploit
References	~~() https://www.vulncheck.com/advisories/echat-server-buffer-overflow-via-chat-ghp-username-parameter -~~	() https://www.vulncheck.com/advisories/echat-server-buffer-overflow-via-chat-ghp-username-parameter - Third Party Advisory

28 Mar 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-28 12:16

Updated : 2026-04-02 19:15

NVD link : CVE-2018-25221

Mitre link : CVE-2018-25221

CVE.ORG link : CVE-2018-25221

JSON object : View

Products Affected

echatserver

easy_chat_server

CWE

CWE-787

Out-of-bounds Write

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