InfoSecBulletin Cybersecurity for mankind
The Forum of Incident Response and Security Teams (FIRST) has recently announced the release of CVSS v4.0, the latest version of the Common Vulnerability Scoring System (CVSS) standard. This update comes more than eight years after the release of CVSS v3.0 in June 2015.
Version 4.0 of CVSS aims to improve vulnerability assessment for both industry and the public, according to FIRST.
Google reports 97 zero-days exploited in 2024, 50% in spyware attacks
Palo Alto Networks to Acquire AI Security Firm “Protect AI”
CISA Releases Seven ICS Advisories
India Launches First Quantum Computing Village in Amaravati
400+ SAP NetWeaver Devices Vulnerable to 0-Day Attacks
30 Teams Qualify for Online Preliminary Round At UAP CTF Contest
CVE-2025-43859
Request Smuggling Vulnerability in Python’s h11 HTTP Library
NVIDIA Releases Security Update For GPU Driver Vulnerabilities
‘SessionShark’ ToolKit Bypasses Microsoft Office 365 MFA
159 CVEs Exploited in Q1 2025 : 28.3% Within 24 Hours of Disclosure
CVSS is used to measure the severity of security vulnerabilities. It assigns a numerical score to each vulnerability, which can be translated into levels like low, medium, high, and critical. This helps organizations prioritize their vulnerability management.
In July 2019, an important update was made to CVSS v3.1. It highlighted that CVSS is meant to gauge the seriousness of a vulnerability and should not be the sole factor in evaluating risk.
CVSS v3.1 has received criticism for its scoring scale and for not properly representing health, human safety, and industrial control systems.
The new standard has added extra metrics to assess vulnerabilities. These metrics include Safety (S), Automatable (A), Recovery (R), Value Density (V), Vulnerability Response Effort (RE), and Provider Urgency (U).
It introduces new names for scoring CVSS. The new names are Base (CVSS-B), Base + Threat (CVSS-BT), Base + Environmental (CVSS-BE), and Base + Threat + Environmental (CVSS-BTE).
“The recommended approach is to emphasize that CVSS encompasses more than just the Base score, and this terminology should be employed whenever a numerical CVSS value is presented or conveyed.”
“The CVSS Base Score should be considered in conjunction with the analysis of the environment and attributes that may change over time.”
