Update laravel.md

Author: carlospolop

src/network-services-pentesting/pentesting-web/laravel.md

@@ -89,7 +89,18 @@ curl -H "Cookie: laravel_session=<orig>; <cookie_name>=$(cat forged.txt)" https:
 ```
 
 
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+## Mass APP_KEY discovery via cookie brute-force
+
+Because every fresh Laravel response sets at least 1 encrypted cookie (`XSRF-TOKEN` and usually `laravel_session`), **public internet scanners (Shodan, Censys, …) leak millions of ciphertexts** that can be attacked offline.
+
+Key findings of the research published by Synacktiv (2024-2025):
+* Dataset July 2024 » 580 k tokens, **3.99 % keys cracked** (≈23 k)
+* Dataset May 2025 » 625 k tokens, **3.56 % keys cracked**
+* >1 000 servers still vulnerable to legacy CVE-2018-15133 because tokens directly contain serialized data.
+* Huge key reuse – the Top-10 APP_KEYs are hard-coded defaults shipped with commercial Laravel templates (UltimatePOS, Invoice Ninja, XPanel, …).
+
+The private Go tool **nounours** pushes AES-CBC/GCM bruteforce throughput to ~1.5 billion tries/s, reducing full dataset cracking to <2 minutes.
+
 
 ## CVE-2024-52301 – HTTP argv/env override → auth bypass