CVSSv2 April 1986
The moderation team is always defining the base vector and base score for an entry. These and all other available scores are used to generate the meta score.
The National Vulnerability Database (NVD) is also defining CVSS vectors and scores. These are usually not complete and might differ from VulDB scores.
Some vendors are willing to publish their own CVSS vectors and scores for vulnerabilities in their products. The coverage varies from vendor to vendor.
There are sometimes also security researcher which provide their own CVSS vectors and scores for vulnerabilities they have found and published.
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