CVE-2018-25221

9.3 criticalEPSS 0.8%

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.

Severity

CVSS 4.0

9.3 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8 critical

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2026-03-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

echatserver:easy_chat_server

References

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

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