org-metaeffekt/metaeffekt-core
Nov 2024 – Feb 2026
15 Months active
Languages Used
JavaJavaScriptVMVelocitySVG
Technical Skills
Backend DevelopmentBigDecimalCVSSFloating-point arithmeticMaven Plugin DevelopmentUnit Testing
ywittmann
PROFILE
Ywittmann
Yan Wittmann engineered core vulnerability management and security policy features for the org-metaeffekt/metaeffekt-core repository over 15 months. He delivered robust backend systems for risk scoring, data modeling, and configuration management, focusing on accurate vulnerability assessment and flexible policy governance. Using Java and JSON processing, Yan refactored data structures, optimized CVSS handling, and enhanced reporting workflows to improve risk visibility and compliance. His work included integrating new data sources, strengthening error handling, and refining test automation. The depth of his contributions is reflected in the improved maintainability, configurability, and reliability of the platform’s security analytics and policy enforcement capabilities.
Overall Statistics
Feature vs Bugs
74%Features
Repository Contributions
63Total
Bugs
10
Commits
63
Features
28
Lines of code
33,900
Activity Months15
Your Network
20 peopleSame Organization
@metaeffekt.com7
Shared Repositories
13
Work History
February 2026
4 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary focused on security policy governance improvements and robust error handling, delivering measurable business value through improved security posture, observability, and developer productivity.
4 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary focused on security policy governance improvements and robust error handling, delivering measurable business value through improved security posture, observability, and developer productivity.
February 2026
January 2026
5 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for org-metaeffekt/metaeffekt-core focusing on ProcessConfiguration improvements, refactor AE-1715, test stabilization, and business value.
January 2026
5 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for org-metaeffekt/metaeffekt-core focusing on ProcessConfiguration improvements, refactor AE-1715, test stabilization, and business value.
December 2025
3 Commits • 2 Features
Dec 1, 2025Month: 2025-12. Focus: security policy enhancements and vulnerability data coverage for org-metaeffekt/metaeffekt-core. Delivered two features that improve governance, risk prioritization, and operational insight: CentralSecurityPolicyConfiguration enhancements (assessmentReviewPeriod and sourceAssessmentContextPattern) and OSV-based data coverage improvements (additional providers and better handling of weaknesses/attack patterns).
3 Commits • 2 Features
Dec 1, 2025Month: 2025-12. Focus: security policy enhancements and vulnerability data coverage for org-metaeffekt/metaeffekt-core. Delivered two features that improve governance, risk prioritization, and operational insight: CentralSecurityPolicyConfiguration enhancements (assessmentReviewPeriod and sourceAssessmentContextPattern) and OSV-based data coverage improvements (additional providers and better handling of weaknesses/attack patterns).
December 2025
November 2025
7 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered core vulnerability assessment data model and rendering enhancements, strengthened Central Security Policy loader robustness, and improved test portability. This combination delivers more accurate risk scoring, robust policy evaluation, and a more reliable CI/CD pipeline, driving faster security insights and stronger governance.
November 2025
7 Commits • 3 Features
Nov 1, 2025November 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered core vulnerability assessment data model and rendering enhancements, strengthened Central Security Policy loader robustness, and improved test portability. This combination delivers more accurate risk scoring, robust policy evaluation, and a more reliable CI/CD pipeline, driving faster security insights and stronger governance.
October 2025
2 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for org-metaeffekt/metaeffekt-core: Delivered a major overhaul of the Vulnerability Priority Scoring System, enabling independent scaling for CVSS and keyword scores, removing the isElevated concept, and introducing a unified label system including a new 'none' severity category. Reports were updated to reflect the new scoring model, and configuration was refined to tune scoring behavior and severity ranges. This work aligns risk prioritization with central security policy values and enhances roadmap-driven remediation planning.
2 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for org-metaeffekt/metaeffekt-core: Delivered a major overhaul of the Vulnerability Priority Scoring System, enabling independent scaling for CVSS and keyword scores, removing the isElevated concept, and introducing a unified label system including a new 'none' severity category. Reports were updated to reflect the new scoring model, and configuration was refined to tune scoring behavior and severity ranges. This work aligns risk prioritization with central security policy values and enhances roadmap-driven remediation planning.
October 2025
September 2025
6 Commits • 1 Features
Sep 1, 2025September 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered Asset Summary Report enhancements with improved display (asset names and versions in separate rows), added support for merging single-asset groups, and introduced the enableSingleAssetGroups configuration. Fixed CVSS 3.1 metrics ordering in CvssVector and Cvss3P1, with tests validating reordering per specification. Corrected AEAA Sync OSV provider detection through enhanced content-identifier matching. Addressed type-casting and generic handling issues in AeaaAdvisoryTypeStore and AeaaVulnerabilityTypeStore. These changes improve asset visibility, risk-scoring accuracy, OSV-detection reliability, and overall code safety, enabling faster configuration changes and reducing regressions.
September 2025
6 Commits • 1 Features
Sep 1, 2025September 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered Asset Summary Report enhancements with improved display (asset names and versions in separate rows), added support for merging single-asset groups, and introduced the enableSingleAssetGroups configuration. Fixed CVSS 3.1 metrics ordering in CvssVector and Cvss3P1, with tests validating reordering per specification. Corrected AEAA Sync OSV provider detection through enhanced content-identifier matching. Addressed type-casting and generic handling issues in AeaaAdvisoryTypeStore and AeaaVulnerabilityTypeStore. These changes improve asset visibility, risk-scoring accuracy, OSV-detection reliability, and overall code safety, enabling faster configuration changes and reducing regressions.
August 2025
4 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for org-metaeffekt/metaeffekt-core focusing on delivering accurate vulnerability data handling, improved reporting visibility, UI context, and resilience in tests. Emphasizes business value through clearer vulnerability metadata, actionable reporting, and stable engineering practices.
4 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for org-metaeffekt/metaeffekt-core focusing on delivering accurate vulnerability data handling, improved reporting visibility, UI context, and resilience in tests. Emphasizes business value through clearer vulnerability metadata, actionable reporting, and stable engineering practices.
August 2025
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 performance: Delivered key vulnerability-management improvements in the core repo, focusing on safer baseline resets, a comprehensive AEAA vulnerability/inventory overhaul, and clearer error reporting. These changes enhance data integrity, operational efficiency, and decision support for remediation across the vulnerability lifecycle.
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 performance: Delivered key vulnerability-management improvements in the core repo, focusing on safer baseline resets, a comprehensive AEAA vulnerability/inventory overhaul, and clearer error reporting. These changes enhance data integrity, operational efficiency, and decision support for remediation across the vulnerability lifecycle.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025: Delivered two major features in org-metaeffekt/metaeffekt-core focused on security policy reliability and data processing robustness. CSP Loader Refactor and Security Policy Loading Enhancement simplified CSP configuration, removed legacy security policy parsing, added a capability to load multiple configuration files, and consolidated loading logic to improve maintainability and security policy handling. MITRE ATT&CK and CAPEC Data Processing Refactor improved JSON parsing/serialization for AeaaCapecEntry and AeaaCweEntry, renamed AeaaConsequence to AeaaWeaknessConsequence for clarity, added new enum constants, and strengthened error handling in AeaaMitre to boost robustness and data integrity. These changes reduce configuration drift, improve data quality, and lay groundwork for scalable deployments across security features. Commits: 7bfa2d053720a2a5f679a806ecffde39b11b7af6 (AE-1120) and 926c7a4dec1d48c1838e371f979d460b9ba04285 (CWE/CAPEC Review).
2 Commits • 2 Features
Jun 1, 2025June 2025: Delivered two major features in org-metaeffekt/metaeffekt-core focused on security policy reliability and data processing robustness. CSP Loader Refactor and Security Policy Loading Enhancement simplified CSP configuration, removed legacy security policy parsing, added a capability to load multiple configuration files, and consolidated loading logic to improve maintainability and security policy handling. MITRE ATT&CK and CAPEC Data Processing Refactor improved JSON parsing/serialization for AeaaCapecEntry and AeaaCweEntry, renamed AeaaConsequence to AeaaWeaknessConsequence for clarity, added new enum constants, and strengthened error handling in AeaaMitre to boost robustness and data integrity. These changes reduce configuration drift, improve data quality, and lay groundwork for scalable deployments across security features. Commits: 7bfa2d053720a2a5f679a806ecffde39b11b7af6 (AE-1120) and 926c7a4dec1d48c1838e371f979d460b9ba04285 (CWE/CAPEC Review).
June 2025
May 2025
4 Commits • 2 Features
May 1, 2025May 2025 highlights for org-metaeffekt/metaeffekt-core: Delivered security policy enhancements and CVSS handling improvements that strengthen policy accuracy, security posture, and maintainability. Key deliverables include EPSS integration in security policy, CSP loading improvements, and a CSP-focused refactor (CspLoader) that centralizes parsing and moves advisory overview generation to CSP. CVSS handling was hardened with strict parsing and a flexible serialization option to filter undefined properties, improving reliability and debuggability. Overall, these changes reduce risks, improve policy explanations, and set a solid foundation for future security policy enhancements.
May 2025
4 Commits • 2 Features
May 1, 2025May 2025 highlights for org-metaeffekt/metaeffekt-core: Delivered security policy enhancements and CVSS handling improvements that strengthen policy accuracy, security posture, and maintainability. Key deliverables include EPSS integration in security policy, CSP loading improvements, and a CSP-focused refactor (CspLoader) that centralizes parsing and moves advisory overview generation to CSP. CVSS handling was hardened with strict parsing and a flexible serialization option to filter undefined properties, improving reliability and debuggability. Overall, these changes reduce risks, improve policy explanations, and set a solid foundation for future security policy enhancements.
April 2025
1 Commits
Apr 1, 2025In April 2025, the team delivered a stability-focused update to the vulnerability prioritization workflow within the core product. The Vulnerability Priority Score Calculation Stabilization fixes default initialization gaps and refines the calculation path, enhancing reliability of risk scoring in production. The changes reduce edge-case mis-prioritization and simplify maintenance by removing an unnecessary conditional in the effectiveTimeUntilExtendedSupportEnd logic.
1 Commits
Apr 1, 2025In April 2025, the team delivered a stability-focused update to the vulnerability prioritization workflow within the core product. The Vulnerability Priority Score Calculation Stabilization fixes default initialization gaps and refines the calculation path, enhancing reliability of risk scoring in production. The changes reduce edge-case mis-prioritization and simplify maintenance by removing an unnecessary conditional in the effectiveTimeUntilExtendedSupportEnd logic.
April 2025
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025 — Highlights for org-metaeffekt/metaeffekt-core focusing on feature delivery and reliability improvements. Key deliveries include preserving inventory scope for auto-appended vulnerability assessments and ensuring robust CVSS scoring across versions, with corresponding test alignment. These changes enhance assessment accuracy, preserve the original inventory context, and improve risk prioritization for stakeholders.
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025 — Highlights for org-metaeffekt/metaeffekt-core focusing on feature delivery and reliability improvements. Key deliveries include preserving inventory scope for auto-appended vulnerability assessments and ensuring robust CVSS scoring across versions, with corresponding test alignment. These changes enhance assessment accuracy, preserve the original inventory context, and improve risk prioritization for stakeholders.
February 2025
9 Commits • 5 Features
Feb 1, 2025February 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered core data quality and scoring enhancements, overhauled the vulnerability assessment model, and improved artifact inventory processing. Notable improvements include OSV/CSAF data source integration, CVSS vector parsing/performance optimization, AEAA model adoption, Gson integration for artifact inventory, and tracking of unused source events for enhanced auditing. Fixed key issues: inconsistencies in OSV/CSAF implementation and reordering of effective assessment events. These changes increase data accuracy, processing speed, and reporting capabilities, delivering tangible business value in risk visibility and compliance.
9 Commits • 5 Features
Feb 1, 2025February 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered core data quality and scoring enhancements, overhauled the vulnerability assessment model, and improved artifact inventory processing. Notable improvements include OSV/CSAF data source integration, CVSS vector parsing/performance optimization, AEAA model adoption, Gson integration for artifact inventory, and tracking of unused source events for enhanced auditing. Fixed key issues: inconsistencies in OSV/CSAF implementation and reordering of effective assessment events. These changes increase data accuracy, processing speed, and reporting capabilities, delivering tangible business value in risk visibility and compliance.
February 2025
January 2025
7 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for org-metaeffekt/metaeffekt-core focused on delivering core CVSS and data-source capabilities, robustness, and performance improvements that drive business value in vulnerability analytics. Highlights include CSAF data source integration with enhancements to CVSS selector parsing, robust handling of data model references, a configurable CVSS source header escaping toggle, CVSS vector cloning optimization, and significant date parsing performance improvements, all supported by targeted tests to ensure regression safety and default selector correctness.
January 2025
7 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for org-metaeffekt/metaeffekt-core focused on delivering core CVSS and data-source capabilities, robustness, and performance improvements that drive business value in vulnerability analytics. Highlights include CSAF data source integration with enhancements to CVSS selector parsing, robust handling of data model references, a configurable CVSS source header escaping toggle, CVSS vector cloning optimization, and significant date parsing performance improvements, all supported by targeted tests to ensure regression safety and default selector correctness.
November 2024
2 Commits
Nov 1, 2024Month: 2024-11. This period focused on stabilizing core risk-scoring and report-generation workflows in the metaeffekt-core repository. No new features were released this month; two critical bug fixes were completed that improve accuracy, configurability, and security posture. The work delivered tangible business value by improving risk scoring reliability and ensuring security policy configurations are properly applied during report generation.
2 Commits
Nov 1, 2024Month: 2024-11. This period focused on stabilizing core risk-scoring and report-generation workflows in the metaeffekt-core repository. No new features were released this month; two critical bug fixes were completed that improve accuracy, configurability, and security posture. The work delivered tangible business value by improving risk scoring reliability and ensuring security policy configurations are properly applied during report generation.
November 2024
Activity
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Quality Metrics
Correctness88.4%
Maintainability87.0%
Architecture85.2%
Performance81.8%
AI Usage24.2%
Skills & Technologies
Programming Languages
JavaJavaScriptSVGVMVelocity
Technical Skills
API DesignAPI DevelopmentBackend DevelopmentBigDecimalCVSSCode RefactoringConfiguration ManagementData ModelingData ProcessingData StructuresDate and Time ManipulationDocumentationEPSSError HandlingFloating-point arithmetic
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline