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<!doctype html><html lang="en" class="web tlp-clear" data-studio-config="eyJ4aHJDcmVkZW50aWFscyI6ZmFsc2UsInhockhlYWRlcnMiOnt9fQo="><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Common Vulnerability Scoring System SIG</title> <meta property="og:title" content="Common Vulnerability Scoring System SIG" /> <meta property="og:type" content="website" /> <meta property="og:image" content="https://www.first.org/cvss/identity/cvssv4.png" /> <meta property="og:url" content="https://www.first.org/cvss/" /> <meta property="og:site_name" content="FIRST — Forum of Incident Response and Security Teams" /> <meta property="fb:profile_id" content="296983660669109" /> <meta property="twitter:card" content="summary_large_image" /> <meta property="twitter:site" content="@FIRSTdotOrg" /> <meta property="twitter:image" content="https://www.first.org/cvss/identity/cvssv4.png" /><meta name="viewport" content="initial-scale=1,maximum-scale=1.0,user-scalable=no" /><link 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Links</a></li></ul></li><li><a href="/cvss/v1">CVSS v1 Archive</a><ul><li><a href="/cvss/v1/intro">Introduction to CVSS</a></li><li><a href="/cvss/v1/faq">Frequently Asked Questions</a></li><li><a href="/cvss/v1/guide">Complete CVSS v1 Guide</a></li></ul></li><li><a href="/cvss/data-representations">JSON & XML Data Representations</a></li><li><a href="/cvss/training">CVSS On-Line Training Course</a></li><li><a href="/cvss/identity">Identity & logo usage</a></li></ul></li><li><a href="/global/sigs/csirt">CSIRT Framework Development SIG</a></li><li><a href="/global/sigs/cyberinsurance">Cyber Insurance SIG</a><ul><li><a href="/global/sigs/cyberinsurance/events">Cyber Insurance SIG Webinars</a></li></ul></li><li><a href="/global/sigs/cti">Cyber Threat Intelligence SIG</a><ul><li><a href="/global/sigs/cti/curriculum/">Curriculum</a><ul><li><a href="/global/sigs/cti/curriculum/introduction">Introduction</a></li><li><a href="/global/sigs/cti/curriculum/cti-introduction">Introduction to CTI as a General topic</a></li><li><a href="/global/sigs/cti/curriculum/methods-methodology">Methods and Methodology</a></li><li><a href="/global/sigs/cti/curriculum/pir">Priority Intelligence Requirement (PIR)</a></li><li><a href="/global/sigs/cti/curriculum/source-evaluation">Source Evaluation and Information Reliability</a></li><li><a href="/global/sigs/cti/curriculum/machine-human">Machine and Human Analysis Techniques (and Intelligence Cycle)</a></li><li><a href="/global/sigs/cti/curriculum/threat-modelling">Threat Modelling</a></li><li><a href="/global/sigs/cti/curriculum/training">Training</a></li><li><a href="/global/sigs/cti/curriculum/standards">Standards</a></li><li><a href="/global/sigs/cti/curriculum/glossary">Glossary</a></li><li><a href="/global/sigs/cti/curriculum/cti-reporting/">Communicating Uncertainties in CTI Reporting</a></li></ul></li><li><a href="/global/sigs/cti/events/">Webinars and Online Training</a></li><li><a href="/global/sigs/cti/cti-program">Building a CTI program and team</a><ul><li><a href="/global/sigs/cti/cti-program/program-stages">Program maturity stages</a><ul><li><a href="/global/sigs/cti/cti-program/stage1">CTI Maturity model - Stage 1</a></li><li><a href="/global/sigs/cti/cti-program/stage2">CTI Maturity model - Stage 2</a></li><li><a href="/global/sigs/cti/cti-program/stage3">CTI Maturity model - Stage 3</a></li></ul></li><li><a href="/global/sigs/cti/cti-program/starter-kit">Program Starter Kit</a></li><li><a href="/global/sigs/cti/cti-program/resources">Resources and supporting materials</a></li></ul></li></ul></li><li><a href="/global/sigs/digital-safety">Digital Safety SIG</a></li><li><a href="/global/sigs/dns">DNS Abuse SIG</a><ul><li><a href="/global/sigs/dns/policies">Code of Conduct & Other Policies</a></li><li><a href="/global/sigs/dns/dns-abuse-examples">Examples of DNS Abuse</a></li></ul></li><li><a href="/global/sigs/ethics">Ethics SIG</a><ul><li><a href="/global/sigs/ethics/ethics-first">Ethics for Incident Response Teams</a></li></ul></li><li><a href="/epss/">Exploit Prediction Scoring System (EPSS)</a><ul><li><a href="/epss/model">The EPSS Model</a></li><li><a href="/epss/data_stats">Data and Statistics</a></li><li><a href="/epss/user-guide">User Guide</a></li><li><a href="/epss/research">EPSS Research and Presentations</a></li><li><a href="/epss/faq">Frequently Asked Questions</a></li><li><a href="/epss/who_is_using">Who is using EPSS?</a></li><li><a href="/epss/epss_tools">Open-source EPSS Tools</a></li><li><a href="/epss/api">API</a></li><li><a href="/epss/papers">Related Exploit Research</a></li><li><a>Blog</a><ul><li><a href="/epss/articles/prob_percentile_bins">Understanding EPSS Probabilities and Percentiles</a></li><li><a href="/epss/articles/log4shell">Log4Shell Use Case</a></li><li><a href="/epss/articles/estimating_old_cvss">Estimating CVSS v3 Scores for 100,000 Older Vulnerabilities</a></li></ul></li><li><a href="/epss/partners">Data Partners</a></li></ul></li><li><a href="/global/sigs/msr/">FIRST Multi-Stakeholder Ransomware SIG</a></li><li><a href="/global/sigs/hfs/">Human Factors in Security SIG</a></li><li><a href="/global/sigs/ics">Industrial Control Systems SIG (ICS-SIG)</a></li><li><a href="/global/sigs/iep">Information Exchange Policy SIG (IEP-SIG)</a></li><li><a href="/global/sigs/information-sharing">Information Sharing SIG</a><ul><li><a href="/global/sigs/information-sharing/misp">Malware Information Sharing Platform</a></li></ul></li><li><a href="/global/sigs/le">Law Enforcement SIG</a></li><li><a href="/global/sigs/malware">Malware Analysis SIG</a><ul><li><a href="/global/sigs/malware/ma-framework">Malware Analysis Framework</a></li><li><a href="/global/sigs/malware/ma-framework/malwaretools">Malware Analysis Tools</a></li></ul></li><li><a href="/global/sigs/metrics">Metrics SIG</a><ul><li><a href="/global/sigs/metrics/events">Metrics SIG Webinars</a></li></ul></li><li><a href="/global/sigs/netsec/">NETSEC SIG</a></li><li><a href="/global/sigs/passive-dns">Passive DNS Exchange</a></li><li><a href="/global/sigs/policy">Policy SIG</a></li><li><a href="/global/sigs/psirt">PSIRT SIG</a></li><li><a href="/global/sigs/red-team">Red Team SIG</a></li><li><a href="/global/sigs/cpg">Retail and Consumer Packaged Goods (CPG) SIG</a></li><li><a href="/global/sigs/ctf">Security Lounge SIG</a></li><li><a href="/global/sigs/tic/">Threat Intel Coalition SIG</a><ul><li><a href="/global/sigs/tic/membership-rules">Membership Requirements and Veto Rules</a></li></ul></li><li><a href="/global/sigs/tlp">Traffic Light Protocol (TLP-SIG)</a></li><li><a href="/global/sigs/transport">Transportation and Mobility SIG</a></li><li><a href="/global/sigs/vulnerability-coordination">Vulnerability Coordination</a><ul><li><a href="/global/sigs/vulnerability-coordination/multiparty">Multi-Party Vulnerability Coordination and Disclosure</a></li><li><a href="/global/sigs/vulnerability-coordination/multiparty/guidelines">Guidelines and Practices for Multi-Party Vulnerability Coordination and Disclosure</a></li></ul></li><li><a href="/global/sigs/vrdx">Vulnerability Reporting and Data eXchange SIG (VRDX-SIG)</a><ul><li><a href="/global/sigs/vrdx/vdb-catalog">Vulnerability Database Catalog</a></li></ul></li><li><a href="/global/sigs/wof">Women of FIRST</a></li></ul></li><li><a href="/global/governance">Internet Governance</a></li><li><a href="/global/irt-database">IR Database</a></li><li><a href="/global/fellowship">Fellowship Program</a><ul><li><a href="https://portal.first.org/fellowship">Application Form</a></li></ul></li><li><a href="/global/mentorship">Mentorship Program</a></li><li><a href="/hof">IR Hall of Fame</a><ul><li><a href="/hof/inductees">Hall of Fame Inductees</a></li></ul></li><li><a href="/global/victim-notification">Victim Notification</a></li><li><a href="/volunteers/">Volunteers at FIRST</a><ul><li><a href="/volunteers/list">FIRST Volunteers</a></li><li><a href="/volunteers/participation">Volunteer Contribution Record</a></li></ul></li><li><a href="#new">Previous Activities</a><ul><li><a href="/global/practices">Best Practices Contest</a></li></ul></li></ul></li><li><a href="/standards">Standards & Publications</a><ul><li><a href="/standards">Standards</a><ul><li><a href="/cvss">Common Vulnerability Scoring System (CVSS-SIG)</a></li><li><a href="/tlp">Traffic Light Protocol (TLP)</a><ul><li><a href="/tlp/use-cases">TLP Use Cases</a></li></ul></li><li><a href="/standards/frameworks/">Service Frameworks</a><ul><li><a href="/standards/frameworks/csirts">CSIRT Services Framework</a></li><li><a href="/standards/frameworks/psirts">PSIRT Services Framework</a></li></ul></li><li><a href="/iep">Information Exchange Policy (IEP)</a><ul><li><a href="/iep/iep_framework_2_0">IEP 2.0 Framework</a></li><li><a href="/iep/iep-json-2_0">IEP 2.0 JSON Specification</a></li><li><a href="/iep/iep-polices">Standard IEP Policies</a><ul><li><a href="https://www.first.org/iep/2.0/first-tlp-iep.iepj">IEP TLP Policy File</a></li><li><a href="https://www.first.org/iep/2.0/first-unknown-iep.iepj">IEP Unknown Policy File</a></li></ul></li><li><a href="/iep/iep_v1_0">IEP 1.0 Archive</a></li></ul></li><li><a href="/global/sigs/passive-dns">Passive DNS Exchange</a></li><li><a href="/epss">Exploit Prediction Scoring System (EPSS)</a></li></ul></li><li><a href="/resources/papers">Publications</a></li></ul></li><li><a href="/events">Events</a></li><li><a href="/education">Education</a><ul><li><a href="/education/first-training">FIRST Training</a><ul><li><a href="/education/trainings">Training Courses</a></li><li><a href="/education/trainers">FIRST Trainers</a></li></ul></li></ul></li><li><a href="/blog">Blog</a></li></ul> </div> </div> <div id="home-buttons"> <p><a href="/join" data-title="Join"><img alt="Join" src="/_/img/icon-join.svg"><span class="tt-join">Join<span>Details about FIRST membership and joining as a full member or liaison.</span></span></a> <a href="/learn" data-title="Learn"><img alt="Learn" src="/_/img/icon-learn.svg"><span class="tt-learn">Learn<span>Training and workshop opportunities, and details about the FIRST learning platform.</span></span></a> <a href="/participate" data-title="Participate"><img alt="Participate" src="/_/img/icon-participate.svg"><span class="tt-participate">Participate<span>Read about upcoming events, SIGs, and know what is going on.</span></span></a></p> </div></div></div></header><div id="body" data-studio="CU52CV1W8g"><div id="c1" data-studio="Yu8FjCC11g"><h1 id="Common-Vulnerability-Scoring-System-SIG">Common Vulnerability Scoring System SIG</h1> <p>The <strong>CVSS SIG</strong> continues to work on gathering feedback and updating CVSS v4.0. The CVSS documentation, including the User Guide, FAQ, and Examples have seen updates since the initial release in November 2023. Currently, the CVSS SIG is developing a roadmap for future updates to the standard. To that end, the CVSS SIG has created a survey to understand the usage of CVSS in general and the new CVSS v4.0 in particular. <a href="https://survey.alchemer.com/s3/8015778/CVSS">That survey is available at here</a></p> <p>Please submit your responses to help guide the future of CVSS. If you have additional information or suggestions, please follow up with <a href="mailto:cvss@first.org">cvss@first.org</a>. The CVSS SIG cannot respond to each request but will review all submissions.</p> <h2 id="Mission">Mission</h2> <p>The Common Vulnerability Scoring System (CVSS) provides a way to capture the principal characteristics of a vulnerability and produce a numerical score reflecting its severity. The numerical score can then be translated into a qualitative representation (such as low, medium, high, and critical) to help organizations properly assess and prioritize their vulnerability management processes.</p> <p>CVSS is a published standard used by organizations worldwide, and the SIG's mission is to continue to improve it.</p> <h2 id="Goals-Deliverables">Goals/Deliverables</h2> <p>CVSS is currently at version 4.0. Links on the left lead to CVSS version 4.0's specification and related resources.</p> <p>A <a href="https://learn.first.org">self-paced on-line training course</a> is available for CVSS v4.0. It explains the standard without assuming any prior CVSS experience. </p> <h2 id="Latest-Initiatives">Latest Initiatives</h2> <p>The CVSS Special Interest Group (SIG) is proud to announce the official publication of <strong>CVSS v4.0</strong>. The latest information on CVSS v4.0 can be found on our <a href="/cvss/v4-0/index.html">CVSS v4.0 landing page</a>.</p> <p>The SIG is composed of representatives from a broad range of industry sectors, from banking and finance to technology and academia. 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