Integrate FIRST's Exploit Prediction Scoring System (EPSS) API to prioritize vulnerability remediation based on real-world exploitation probability within 30 days. Use when integrateing first's exploit prediction scoring system (epss) api to prioritize.
Integrate FIRST's Exploit Prediction Scoring System (EPSS) API to prioritize vulnerability remediation based on real-world exploitation probability within 30 days. Use when integrateing first's exploit prediction scoring system (epss) api to prioritize.
Implementing EPSS Score for Vulnerability Prioritization
Overview
The Exploit Prediction Scoring System (EPSS) is a data-driven model developed by FIRST (Forum of Incident Response and Security Teams) that estimates the probability of a CVE being exploited in the wild within the next 30 days. EPSS produces scores from 0.0 to 1.0 (0% to 100%) using machine learning trained on real-world exploitation data. Unlike CVSS which measures severity, EPSS measures likelihood of exploitation, making it essential for risk-based vulnerability prioritization.
When to Use
Trigger phrases:
"implementing epss score for vulnerability prioritization"
"Integrate FIRST's Exploit Prediction Scoring System (EPSS) API to prioritize vul"
When deploying or configuring implementing epss score for vulnerability prioritization capabilities in your environment
When establishing security controls aligned to compliance requirements
When building or improving security architecture for this domain
When conducting security assessments that require this implementation
# Get EPSS score for a specific date
curl -s "https://api.first.org/data/v1/epss?cve=CVE-2024-3400&date=2024-04-12"# Get time series data
curl -s "https://api.first.org/data/v1/epss?cve=CVE-2024-3400&scope=time-series"
Prioritization Strategy
This section covers prioritization strategy for implementing epss score for vulnerability prioritization.
Ensure all prerequisites are met before proceeding
Follow the documented workflow steps in sequence
Record results and any anomalies encountered during this phase
EPSS + CVSS Combined Approach
EPSS Score
CVSS Score
Priority
Action
> 0.7
>= 9.0
P0 - Immediate
Remediate within 24 hours
> 0.7
>= 7.0
P1 - Urgent
Remediate within 48 hours
> 0.4
>= 7.0
P2 - High
Remediate within 7 days
> 0.1
>= 4.0
P3 - Medium
Remediate within 30 days
<= 0.1
>= 7.0
P3 - Medium
Remediate within 30 days
<= 0.1
< 7.0
P4 - Low
Remediate within 90 days
EPSS Percentile Thresholds
Top 1% (percentile >= 0.99): Extremely likely to be exploited; treat as Critical
Top 5% (percentile >= 0.95): High exploitation probability; prioritize remediation
Top 10% (percentile >= 0.90): Elevated risk; schedule for near-term remediation
Bottom 50%: Low exploitation probability; handle in normal patch cycle
