Calculate and validate CVSS 2.0, 3.0, 3.1, and 4.0 base scores.
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Calculate a CVSS Base-only score for 2.0, 3.0, 3.1 or 4.0. Supply every metric; never guess. v2: AV Access Vector, AC Access Complexity, Au Authentication, C/I/A Confidentiality/Integrity/Availability. v3: AV Attack Vector, AC Attack Complexity, PR Privileges Required, UI User Interaction, S Scope, C/I/A impact. v4: AT Attack Requirements, VC/VI/VA Vulnerable System impact, SC/SI/SA Subsequent System impact. Rejects non-Base metrics.
Complete case-sensitive Base-only vector. v2: AV L/A/N, AC H/M/L, Au M/S/N, C/I/A N/P/C. v3: AV N/A/L/P, AC L/H, PR N/L/H, UI N/R, S U/C, C/I/A H/L/N. v4: AV N/A/L/P, AC L/H, AT N/P, PR N/L/H, UI N/P/A, VC/VI/VA/SC/SI/SA H/L/N.
CVSS version
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
claude mcp add --transport http cvss-calculator-mcp https://cvss.my.id/mcp
Calculate a CVSS Base-only score for 2.0, 3.0, 3.1 or 4.0. Supply every metric; never guess. v2: AV Access Vector, AC Access Complexity, Au Authentication, C/I/A Confidentiality/Integrity/Availability. v3: AV Attack Vector, AC Attack Complexity, PR Privileges Required, UI User Interaction, S Scope, C/I/A impact. v4: AT Attack Requirements, VC/VI/VA Vulnerable System impact, SC/SI/SA Subsequent System impact. Rejects non-Base metrics.
| Argument | Type | Description |
|---|---|---|
| vector* | string | Complete case-sensitive Base-only vector. v2: AV L/A/N, AC H/M/L, Au M/S/N, C/I/A N/P/C. v3: AV N/A/L/P, AC L/H, PR N/L/H, UI N/R, S U/C, C/I/A H/L/N. v4: AV N/A/L/P, AC L/H, AT N/P, PR N/L/H, UI N/P/A, VC/VI/VA/SC/SI/SA H/L/N. |
| version* | string | CVSS version |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"version",
"vector"
],
"properties": {
"vector": {
"type": "string",
"maxLength": 1024,
"minLength": 1,
"description": "Complete case-sensitive Base-only vector. v2: AV L/A/N, AC H/M/L, Au M/S/N, C/I/A N/P/C. v3: AV N/A/L/P, AC L/H, PR N/L/H, UI N/R, S U/C, C/I/A H/L/N. v4: AV N/A/L/P, AC L/H, AT N/P, PR N/L/H, UI N/P/A, VC/VI/VA/SC/SI/SA H/L/N."
},
"version": {
"enum": [
"2.0",
"3.0",
"3.1",
"4.0"
],
"type": "string",
"description": "CVSS version"
}
},
"additionalProperties": false
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 1, 2026.
No readOnlyHint / destructiveHint annotations, so clients can't tell a read from a write without asking.
Fix: Add annotations to each tool, e.g. { readOnlyHint: true } for tools that only read.