Buffer Overflow Vulnerability in EChat Server by EChat Technologies
CVE-2018-25221

9.3CRITICAL

Key Information:

Vendor

Echatserver

Status
Echat Server
Vendor
CVE Published:
28 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25221?

EChat Server 3.1 presents a vulnerability in the chat.ghp endpoint due to potential buffer overflow. This flaw allows remote attackers to exploit the application by sending a specially crafted GET request with an oversized username parameter. The malicious input can trigger code execution within the application environment, leveraging techniques such as shellcode and ROP (Return-Oriented Programming) gadgets to take control of the application.

Affected Version(s)

EChat Server 3.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25221 - Proof of Concept

References

https://www.exploit-db.com/exploits/44155
exploit
https://www.vulncheck.com/advisories/echat-server-buffer-...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Juan Sacco <jsacco@exploitpack.com>
.