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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 shellcode and ROP gadgets to achieve code execution in the application context.

PUBLISHED Reserved 2026-03-28 | Published 2026-03-28 | Updated 2026-03-30 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Out-of-bounds Write

Product status

3.1
affected

Credits

Juan Sacco <jsacco@exploitpack.com> finder

References

www.exploit-db.com/exploits/44155 (ExploitDB-44155) exploit

www.vulncheck.com/...verflow-via-chat-ghp-username-parameter (VulnCheck Advisory: EChat Server 3.1 Buffer Overflow via chat.ghp username Parameter) third-party-advisory

cve.org (CVE-2018-25221)

nvd.nist.gov (CVE-2018-25221)

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