Provided by: libcvss-perl_1.14-1_all 
NAME
CVSS::Base - Base class for CVSS
DESCRIPTION
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 )
DATA REPRESENTATIONS
$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.
SEE ALSO
CVSS::v2, CVSS::v3, CVSS::v4
SUPPORT
Bugs / Feature Requests
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.
Source Code
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
AUTHOR
• Giuseppe Di Terlizzi <gdt@cpan.org>
LICENSE AND COPYRIGHT
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)