Mark Lacore Mark Lacore mark@nerdymark.com

Senior Software Engineer. Python, cybersecurity, robotics, and CTF challenges.

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nerdymark's Software Engineering & Cybersecurity Blog

  • technology
2024-09-18 08:20:00
a showcase of projects, musings, and experiments in tech and security.
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Mark Lacore

X/Twitter API is Now Pay-to-Play - Why I Disabled Cross-Posting

  • technology
2026-03-23 17:53:21 5 min read
Attempted to implement automated cross-posting to X/Twitter and hit a wall of 403s, ghost projects, and a 402 paywall. Here's what happened.
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Mark Lacore

Hardle Solver - Bulls and Cows Word Puzzle Helper

  • gaming
2026-03-16 18:24:17 2 min read
Built a Hardle solver companion tool for the Bulls and Cows style word puzzle. Enter guesses, set correct and misplaced counts, and narrow down candidates from 12,000+ words.
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Mark Lacore

Wordle Solver - Interactive Puzzle Helper

  • technology
2026-03-01 18:01:40 1 min read
New interactive Wordle solver that helps you crack the daily puzzle with live word suggestions, color-coded tile input, and smart filtering.
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Mark Lacore

New Browser Games: Flappy Nerd and Gorillas Now Have Dedicated Pages

  • gaming
2026-03-01 17:34:45 1 min read
Two classic browser games — Flappy Nerd (cyberpunk arcade) and Gorillas (QBasic artillery classic) — now have their own dedicated pages with fullscreen mode, controls reference, and background info.
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Mark Lacore

Trust Issues CTF: Supply Chain Attack on a GitHub Actions Runner

  • ctf
2026-02-25 12:00:00 15 min read
Trust Issues CTF writeup: incident response tracing a trojanized pytest package exfiltrating secrets from a GitHub Actions self-hosted runner via Fernet-encrypted dead drops.
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Mark Lacore

Migrating from JSON Files to DynamoDB with boto3

  • technology
2026-02-23 03:57:44 3 min read
How I moved my Flask blog from flat JSON files to AWS DynamoDB for durable storage, and migrated hardcoded secrets to environment variables.
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Mark Lacore

Wiz Cloud Security Championship - Cracked the Top 30

  • ctf
2026-02-14 12:00:00
Climbed from page 5 to #30 on the Wiz Cloud Security Championship leaderboard with 8 of 12 challenges solved and 137 points. Up from 3 challenges in September.
Wiz Cloud Security Championship - Cracked the Top 30
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Mark Lacore

Confession Booth CTF: Race Condition Privilege Escalation

  • ctf
2026-01-28 12:00:00 15 min read
Confession Booth CTF writeup: race condition exploit between user registration and permission assignment.
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Mark Lacore

State of Affairs CTF Challenge Writeup

  • ctf
2026-01-06 12:00:00 12 min read
State of Affairs CTF writeup: Terraform state poisoning via TF_DATA_DIR and malicious provider injection.
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Mark Lacore
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