CVE-2023-4497: Easy Chat Server XSS vulnerability

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-04 · updated 2026-06-17
Weakness: CWE-79

Description

Easy Chat Server, in its 3.1 version and before, does not sufficiently encrypt user-controlled inputs, resulting in a Cross-Site Scripting (XSS) vulnerability stored via /registresult.htm (POST method), in the Icon parameter. The XSS is loaded from /users.ghp.

Affected products

EFS Software Easy Chat Server: through 3.1

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-efs-software-products
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-efs-software-products

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