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.

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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>
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