EChat Server 3.1 Buffer Overflow via chat.ghp username Parameter
Priority HIGH 81CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00836 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Echatserver | EChat Server | 3.1 | — | No fix listed | CNA |
- EChat Server VendorEchatserver Affected 3.1 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:echatserver:easy_chat_server:*:*:*:*:*:*:*:* | up to 3.1 | Vulnerable | Echatserver |
- cpe:2.3:a:echatserver:easy_chat_server:*:*:*:*:*:*:*:* Versions up to 3.1 Vulnerable ·Echatserver
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-25221
- 2026-10-03 Alias added: GHSA-4xgm-gv32-5pqv
References
Exploit 1
More Echatserver Easy Chat Server vulnerabilities
- TI-2019-15666 Easy Chat Server 3.1 Denial of Service via message Parameter CVSS 4.0HIGH 8.7
- TI-2017-06947 There is a remote stack-based buffer overflow (SEH) in register.ghp in EFS Software Easy… CVSS 3.1CRITICAL 9.8
- TI-2022-22094 Efs Software Easy Chat Server Version 3.1 was discovered to contain a DLL hijacking… CVSS 3.1HIGH 7.8
- TI-2017-06958 register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1 allows remote attackers… CVSS 3.1HIGH 7.5
- TI-2017-06946 register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1 allows remote attackers… CVSS 3.1HIGH 7.5
- TI-2019-14728 An issue was discovered in EFS Easy Chat Server 3.1. CVSS 3.1HIGH 7.5
Sources
- CVE-2018-25221 · CVE Program
- CVE-2018-25221 · NVD
- FIRST EPSS
- GHSA-4xgm-gv32-5pqv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences