CVSS::Base - Base class for CVSS

       •   Giuseppe Di Terlizzi <gdt@cpan.org>

       These are base class for CVSS::v2, CVSS::v3 and CVSS::v4 classes.

   METHODS
       $cvss->version
           Return the CVSS version.

       $cvss->vector_string
           Return the CVSS vector string.

       $cvss->metrics
           Return the HASH of CVSS metrics.

       SCORE&SEVERITY

       $cvss->scores
           Return the HASH of calculated score (base, impact, temporal, etc.).

               $scores = $cvss->scores;

               say Dumper($scores);

               # { "base"           => "7.4",
               #   "exploitability" => "1.6",
               #   "impact"         => "5.9" }

       $cvss->calculate_score
           Performs the calculation of the score in accordance with the CVSS specification.

       $cvss->score_to_severity ( $score )
           Convert the score in severity

       $cvss->base_score
           Return the base score (0 - 10).

       $cvss->base_severity
           Return the base severity (LOW, MEDIUM, HIGH or CRITICAL).

       $cvss->temporal_score
           Return the temporal score (0 - 10) -- (CVSS 2.0/3.x)

       $cvss->temporal_severity
           Return the temporal severity (LOW, MEDIUM, HIGH or CRITICAL) -- (CVSS 2.0/3.x)

       $cvss->environmental_score
           Return the environmental score (0 - 10) -- (CVSS 2.0/3.x)

       $cvss->environmental_severity
           Return the environmental severity (LOW, MEDIUM, HIGH or CRITICAL) -- (CVSS 2.0/3.x)

       $cvss->impact_score
           Return the impact score (0 - 10) -- (CVSS 2.0/3.x)

       $cvss->exploitability_score
           Return the exploitability score (0 - 10) -- (CVSS 2.0/3.x)

       $cvss->modified_impact_score
           Return the modified impact score (0 - 10) -- (CVSS 2.0/3.x)

       METRICS

       $cvss->M ( $metric )
           Return the metric value (short)

               say $cvss->M('AV'); # A

       $cvss->metric ( $metric )
           Return the metric value (long)

               say $cvss->metric('AV'); # ADJACENT_NETWORK

       $cvss->metric_group_is_set ( $group )

       DATAREPRESENTATIONS

       $cvss->to_vector_string
           Convert the CVSS object in vector string

               say $cvss->to_vector_string; # CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

               # or

               say $cvss; # CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

       $cvss->to_xml
           Convert the CVSS object in XML in according of CVSS XML Schema Definition.

           •   https://nvd.nist.gov/schema/cvss-v2_0.2.xsd - XSD for CVSS v2.0

           •   https://www.first.org/cvss/cvss-v3.0.xsd - XSD for CVSS v3.0

           •   https://www.first.org/cvss/cvss-v3.1.xsd - XSD for CVSS v3.1

           •   https://www.first.org/cvss/cvss-v4.0.xsd - XSD for CVSS v4.0

               say $cvss->to_xml;

               # <?xml version="1.0" encoding="UTF-8"?>
               # <cvssv3.1 xmlns="https://www.first.org/cvss/cvss-v3.1.xsd"
               #   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               #   xsi:schemaLocation="https://www.first.org/cvss/cvss-v3.1.xsd https://www.first.org/cvss/cvss-v3.1.xsd"
               #   >
               #
               #   <base_metrics>
               #     <attack-vector>ADJACENT_NETWORK</attack-vector>
               #     <attack-complexity>LOW</attack-complexity>
               #     <privileges-required>LOW</privileges-required>
               #     <user-interaction>REQUIRED</user-interaction>
               #     <scope>UNCHANGED</scope>
               #     <confidentiality-impact>HIGH</confidentiality-impact>
               #     <integrity-impact>HIGH</integrity-impact>
               #     <availability-impact>HIGH</availability-impact>
               #     <base-score>7.4</base-score>
               #     <base-severity>HIGH</base-severity>
               #   </base_metrics>
               #
               # </cvssv3.1>

       $cvss->TO_JSON
           Helper method for JSON modules (JSON, JSON::PP, JSON::XS, Mojo::JSON, etc).

           Convert the CVSS object in JSON format in according of CVSS JSON Schema.

           •   https://www.first.org/cvss/cvss-v2.0.json - JSON Schema for CVSS v2.0.

           •   https://www.first.org/cvss/cvss-v3.0.json - JSON Schema for CVSS v3.0.

           •   https://www.first.org/cvss/cvss-v3.1.json - JSON Schema for CVSS v3.1.

           •   https://www.first.org/cvss/cvss-v4.0.json - JSON Schema for CVSS v4.0.

               use Mojo::JSON qw(encode_json);

               say encode_json($cvss);

               # {
               #    "attackComplexity" : "LOW",
               #    "attackVector" : "ADJACENT_NETWORK",
               #    "availabilityImpact" : "HIGH",
               #    "baseScore" : 7.4,
               #    "baseSeverity" : "HIGH",
               #    "confidentialityImpact" : "HIGH",
               #    "integrityImpact" : "HIGH",
               #    "privilegesRequired" : "LOW",
               #    "scope" : "UNCHANGED",
               #    "userInteraction" : "REQUIRED",
               #    "vectorString" : "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
               #    "version" : "3.1"
               # }

   CONSTANTS
       $cvss->ATTRIBUTES
           Returns the HASH of all metrics in "{ "JSON name" => "metric", ... }" format.

       $cvss->METRIC_GROUPS
           Returns the HASH of the metric group (base, environmental, temporal, etc.) and its metrics.

       $cvss->METRIC_NAMES
           Returns the HASH of the names of all metric values.

       $cvss->METRIC_VALUES
           Returns the HASH of all metric values.

       $cvss->NOT_DEFINED_VALUE
           Returns the NOT_DEFINED vector value ("ND" or "X").

       $cvss->SCORE_SEVERITY
           Returns   the   HASH  of  "{  severity  =>  {  min  =>  score,  max  =>  score  },  ...  }"  used  by
           "score_to_severity".

       $cvss->VECTOR_STRING_REGEX
           Return the Vector String REGEX.

       This software is copyright (c) 2023-2025 by Giuseppe Di Terlizzi.

       This  is  free  software;  you  can  redistribute  it and/or modify it under the same terms as the Perl 5
       programming language system itself.

perl v5.40.1                                       2025-07-08                                    CVSS::Base(3pm)

       CVSS::Base - Base class for CVSS

       CVSS::v2, CVSS::v3, CVSS::v4

Bugs/FeatureRequests
       Please    report    any    bugs    or    feature    requests    through    the    issue    tracker     at
       <https://github.com/giterlizzi/perl-CVSS/issues>.   You will be notified automatically of any progress on
       your issue.

   SourceCode
       This is open source software.  The code repository is available for public review and contribution  under
       the terms of the license.

       <https://github.com/giterlizzi/perl-CVSS>

           git clone https://github.com/giterlizzi/perl-CVSS.git