CVE-2018-25221
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductEchatserver Easy Chat Server
PublishedMar 28, 2026
First seenMar 28, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| echatserver easy_chat_server | v ≤ 3.1 | — |
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