Pricing

Pay per usage

CVSS 3.1 Vector Scorer

Deterministic CVSS 3.1 base-score calculator. Parses one or many CVSS:3.1 vector strings and returns the base score and severity rating per the official CVSS 3.1 specification. Pure code, no AI, no external API.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Ahmed Moussa

Actor stats

Bookmarked

Total users

Monthly active users

11 days ago

Last modified

What it does

Give it one or many CVSS:3.1/... vector strings; it returns the base score (0.0-10.0) and the severity rating (None / Low / Medium / High / Critical) computed by the official CVSS 3.1 formula.

Pure code — no AI, no external API, no database. Same input always yields the same output.
Zero idle cost — the actor only runs (and only computes) when you invoke it.

Input

{
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "vectors": [
    "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N"
  ]
}

Field	Type	Description
`vector`	string	A single CVSS 3.1 vector string.
`vectors`	array	Optional list of additional vectors (scored in addition to `vector`).

Output (one dataset item per vector)

{
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "valid": true,
  "base_score": 9.8,
  "severity": "Critical",
  "metrics": { "attack_vector": "N", "...": "..." }
}

Invalid vector strings return {"valid": false, "error": "..."} rather than failing the run.

Use cases

Batch-score CVSS vectors from a vulnerability scanner or advisory feed.
Add a deterministic, auditable CVSS base-score step to a security pipeline.
Validate / normalize CVSS 3.1 vector strings and get their severity bucket.

How it works (deterministic, code-only)

The vector string is parsed into its base metrics (AV, AC, PR, UI, S, C, I, A) and the official CVSS 3.1 base-score equations are applied in pure code. There is no AI, no network call and no state — the same vector always returns the same score.

Limitations (honest)

Computes the base score only (no Temporal or Environmental metrics).
CVSS 3.1 vectors only; other versions return {"valid": false}.
Invalid vectors are reported per-item, never crashing the whole run.

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