This package is abandoned and no longer maintained. The author suggests using the https://github.com/yeswehack/Cvss package instead.

Common Vulnerability Scoring System Version

1.3.4 2017-04-06 14:39 UTC

This package is auto-updated.

Last update: 2022-02-01 13:04:54 UTC


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Common Vulnerability Scoring System (CVSS) provides a robust and useful scoring system for IT vulnerabilities.

See https://www.first.org/cvss for more informations.


1 - Installation

Dowload the CVSS library using composer:

composer require picoss/cvss

2 - Usage

2.1 Vector parser

First, you need to give the CVSSv3 calculator a valid CVSS vector:

use Picoss\Cvss;

$cvss = new Cvss3();

Base metrics (AV,AC,PR,UI,S,C,I and A) must be defined.

An undefined metric will throw the following error:


A missing metric will throw the following error:


A wrong metric value will throw the following error:


Once the vector is valid, you will able to get several informations about the vector.

2.1 Scores

Score is float number from 0 to 10. CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N vector has a 2.7 base score.

2.1.1 Base score

use Picoss\Cvss;

$cvss = new Cvss3();

echo 'Base score: ' $cvss->getBaseScore();
// Base score: 0

2.1.2 Temporal score

use Picoss\Cvss;

$cvss = new Cvss3();

echo 'Base score: ' $cvss->getBaseScore();
// Base score: 2.7
echo 'Temporal score: ' $cvss->getTemporalScore();
// Temporal score: 2.4

2.1.2 Environmental score

use Picoss\Cvss;

$cvss = new Cvss3();

echo 'Base score: ' $cvss->getBaseScore();
// Base score: 9.1
echo 'Temporal score: ' $cvss->getTemporalScore();
// Temporal score: 7.4
echo 'Environmental score: ' $cvss->getEnvironmentalScore();
// Environmental score: 7.4

2.2 Qualitative Severity Rating Scale

All score can be mapped to a qualitative rating, defined in the table bellow:

Value Textual representation CVSS Score
N None 0.0
L Low 0.1 - 3.9
M Medium 4.0 - 6.9
H High 7.0 - 8.9
C Critical 9.0 - 10.0