CVE-2018-25221
Published: 28 March 2026
Description
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…
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shellcode and ROP gadgets to achieve code execution in the application context.
Mitigating Controls (NIST 800-53 r5)AI
Requires validation of the oversized username parameter in the chat.ghp GET request to prevent buffer overflow exploitation.
Implements memory safeguards like DEP and ASLR to block execution of shellcode and ROP gadgets from the buffer overflow.
Directs identification, reporting, and patching of the specific buffer overflow flaw in EChat Server's chat.ghp endpoint.
Security SummaryAI
CVE-2018-25221 is a buffer overflow vulnerability (CWE-787) in EChat Server 3.1, specifically affecting the chat.ghp endpoint. The issue arises from processing an oversized username parameter, which can trigger a buffer overflow. Published on 2026-03-28, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its potential for high-impact remote exploitation.
Remote, unauthenticated attackers can exploit this vulnerability by sending a GET request to the chat.ghp endpoint with a malicious username parameter containing shellcode and ROP gadgets. Successful exploitation leads to arbitrary code execution in the context of the affected application.
Advisories and related resources include a Vulncheck advisory detailing the buffer overflow via the chat.ghp username parameter and a public exploit published on Exploit-DB at https://www.exploit-db.com/exploits/44155. No specific patch or mitigation details are outlined in the provided information.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE-2018-25221 is a buffer overflow in a public-facing chat server endpoint (chat.ghp) allowing unauthenticated remote code execution via crafted GET request, directly mapping to Exploit Public-Facing Application.