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Improper Authentication


Severity High
Score 7.1/10


LionMax Software Chat Anywhere 2.72a allows remote attackers to cause a denial of service (server crash and client CPU consumption) via a username beginning with percent (%) followed by a null character.

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CWE-287 - Improper Authentication

Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.


Advisory Timeline

  • Published