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# vulnerabilities → security → posthog → ssrf

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Inside PostHog: How SSRF, a ClickHouse SQL Escaping 0day, and Default PostgreSQL Credentials Formed an RCE Chain (ZDI-25-099, ZDI-25-097, ZDI-25-096) - Mehmet Ince @mdisec - Vulnerability Researcher | Building security products | Security Advisor | Amateur Muay Thai fighter

The article details a hands-on investigation of PostHog's security flaws, specifically focusing on server-side request forgery (SSRF) vulnerabilities. It outlines how these weaknesses allow for unauthorized access to internal services, culminating in an RCE chain through ClickHouse and SQL injection.
Saved by tldr-importer · Last saved February 14, 2026 · 6 min read
posthog ✓ ssrf ✓ security ✓ vulnerabilities ✓ + rce