A man in the middle (MITM) attack consists of an attacker secretly relaying the communication between two parties who believe they are directly communicating with each other. See OWASP.

Attack Vector

An attack vector is a path or means by which a hacker can gain access to a network resource to deliver a payload.

Security Incident

A security incident is an occurrence of a vulnerability exploitation. An incident is an attack targeted at a confirmed vulnerability. An incident, just like an attack, is an entity external to your system and is a characteristic of the outside Internet, not the system itself. Despite the fact that the attacks targeted at existing vulnerabilities are a minority, they are of the utmost importance in terms of information security. Wallarm automatically detects the attacks targeted at existing vulnerabilities and displays them as a separate object.

Circular Buffer

A circular buffer is a data structure that uses a single, fixed-size buffer as if it were connected end-to-end. See Wikipedia.


LOM stands for Local Objective Model. LOM is a set of rules for a particular web application. The set of rules is generated based on user requests to the web application and the application's responses.

Invalid Request

A request that was checked by filter node and does not match LOM rules.

Reverse Proxy

A reverse proxy is a type of proxy server that retrieves resources on behalf of a client from a server and returns the resources to the client as if they originated from the Web server itself. See Wikipedia.

Certificate Authority

A certificate authority is an entity that issues digital certificates. See Wikipedia.


A vulnerability is an error made due to negligence or inadequate information when building or implementing a web application that can lead to an information security risk.

The information security risks are:

  • Unauthorized data access; for example, access to read and modify user data.
  • Denial of service.
  • Data corruption and other.

A vulnerability is not a characteristic of the Internet. A vulnerability is a characteristic of your system. Whether or not you have vulnerabilities does not depend on your Internet traffic. The Internet traffic, however, can be used to detect the vulnerabilities, which is what Wallarm does, among other functions.

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