
spamassassin
Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Open-source email filtering framework that detects spam and phishing using content analysis, header checks, Bayesian scoring, and DNS blocklists.

Open Cyber Threat Intelligence Platform

Spam filtering and email processing framework with regex rules, statistical analysis, custom Lua plugins, and external blocklists for MTA integration.

A Python package and CLI for parsing aggregate and forensic DMARC reports

Real-time malicious traffic detection system using public blacklists, static malware trails, and heuristic analysis to identify threats across DNS,…

mboxShell. Fast terminal viewer for MBOX files of any size. Open, search and export emails from Gmail Takeout backups (50GB+) without loading them…

SQL powered operating system instrumentation, monitoring, and analytics.

Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Open-source network IDS/IPS/NSM engine for real-time traffic inspection, intrusion detection and prevention, protocol analysis, and rule-based threat…

Sublime rules for email attack detection, prevention, and threat hunting.

🦄 A curated list of privacy & security-focused software and services


Automation to assess the state of your M365 tenant against CISA's baselines

Hands-on SOC lab: AWS mini-SOC with CloudTrail/GuardDuty, a Python CloudTrail IOC analyzer, phishing header forensics, ELF binary triage, and agent…

CakePHP 5.4.2 - High - Remote - Header injection - SmtpTransport lone LF leftover of GHSA-2qh5

Open-source XDR and SIEM platform for threat detection, log analysis, file integrity monitoring, vulnerability assessment, and compliance management…

SCuBA Secure Configuration Baselines and assessment tool for Google Workspace

AI-first external attack surface assessment with continuous discovery, evidence-based vulnerability validation, and developer-agent MCP integration.