CVE-2018-25221

CRITICAL 9.8

EChat Server 3.1 Buffer Overflow via chat.ghp username Parameter

CVSS Score

9.8

EPSS Score

0.2%

EPSS Percentile

43th

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.

CWE	CWE-787
Vendor	echatserver
Product	echat server
Published	Mar 28, 2026
Last Updated	Mar 30, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Echatserver / EChat Server

3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/44155 vulncheck.com: https://www.vulncheck.com/advisories/echat-server-buffer-overflow-via-chat-ghp-username-parameter

Credits

Juan Sacco <[email protected]>