Denial of Service (DoS) Affecting camaleon_cms package, versions >=2.0.1, <



    Attack Complexity Low

    Threat Intelligence

    EPSS 0.08% (32nd percentile)
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4.3 medium

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  • published 20 Oct 2021
  • disclosed 20 Oct 2021
  • credit Unknown

How to fix?

Upgrade camaleon_cms to version or higher.


camaleon_cms is a dynamic and advanced content management system based on Ruby on Rails as an alternative to Wordpress.

Affected versions of this package are vulnerable to Denial of Service (DoS). The media upload feature crashes permanently when a low privileged attacker uploads a crafted SVG file.


Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

  • High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

  • Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package