Web - Server Web - Server

Discover the mechanisms, protocols and technologies used on the Internet and learn to abuse them!

These challenges are designed to train users on HTML, HTTP and other server side mechanisms. The following series of challenges will cultivate a better understanding of techniques such as : Basic workings of multiple authentication mechanisms, handling form data, inner workings of web applications, etc. ...

Prerequisites:
– Understand HTML.
– Understand the HTTP protocol.
– Ability to manipulate a web browser.

challenges 97 Challenges

Results Name Validations Number of points ↓↑  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution Date
pas_valide HTML - Source code 48% 175928 5 g0uZ 6 3 October 2006
pas_valide Weak password 31% 113647 10 g0uZ 7 3 October 2006
pas_valide PHP - Command injection 19% 69592 10 sambecks 10 20 September 2017
pas_valide HTTP - IP restriction bypass 9% 32087 10 Cyrhades 8 23 March 2021
pas_valide HTTP - Open redirect 19% 69437 10 Swissky 10 2 August 2017
pas_valide HTTP - User-agent 24% 87128 10 g0uZ 10 3 October 2006
pas_valide API - Broken Access 2% 6225 15 Nishacid , Mika 4 18 January 2024
pas_valide Backup file 16% 55965 15 g0uZ 10 27 February 2011
pas_valide HTTP - Directory indexing 22% 79891 15 g0uZ 7 7 October 2006
pas_valide HTTP - Headers 16% 56650 15 Arod 9 11 January 2015
pas_valide HTTP - POST 14% 51593 15 Th1b4ud 10 14 August 2018
pas_valide HTTP - Improper redirect 12% 44134 15 Arod 10 26 November 2014
pas_valide HTTP - Verb tampering 13% 47942 15 g0uZ 10 3 February 2011
pas_valide Install files 13% 45257 15 g0uZ 7 7 October 2006
pas_valide Nginx - Alias Misconfiguration 1% 3442 15 .Yo0x 3 27 September 2024
pas_valide Nginx - Root Location Misconfiguration 1% 1763 15 .Yo0x 1 27 September 2024
pas_valide GraphQL - Introspection 2% 4326 20 apges01 4 19 January 2023
pas_valide JWT - Introduction 5% 18453 20 Kn0wledge 5 21 August 2019
pas_valide HTTP - Cookies 13% 47226 20 g0uZ 8 7 October 2006
pas_valide XSS - Server Side 1% 3289 20 Elf 4 23 June 2023
pas_valide Flask - Unsecure session 1% 3315 20 Sanlokii 1 29 November 2023
pas_valide API - Mass Assignment 2% 3797 20 Nishacid , Mika 2 18 January 2024
pas_valide File upload - MIME type 8% 29227 20 g0uZ 10 26 December 2012
pas_valide Insecure Code Management 4% 14495 20 Swissky 6 29 September 2019
pas_valide CRLF 9% 32713 20 g0uZ 7 31 July 2011
pas_valide File upload - Double extensions 10% 36230 20 g0uZ 10 24 December 2012
pas_valide PHP - assert() 5% 16118 25 Birdy42 10 26 November 2016
pas_valide Python - Server-side Template Injection Introduction 2% 5118 25 Podalirius 7 7 September 2021
pas_valide PHP - register globals 5% 16425 25 g0uZ 2 8 October 2011
pas_valide PHP - Apache configuration 1% 2797 25 erk3 , nemoz 4 8 July 2022
pas_valide PHP - Remote Xdebug 1% 1591 25 mayfly 4 18 March 2020
pas_valide JWT - Unsecure File Signature 1% 2725 25 Nishacid , Mika 3 23 February 2023
pas_valide JWT - Weak secret 4% 12842 25 Jrmbt 8 21 August 2019
pas_valide JWT - Revoked token 2% 6693 25 ArnC 6 20 March 2020
pas_valide File upload - Null byte 7% 24874 25 g0uZ 4 26 December 2012
pas_valide Directory traversal 10% 36646 25 g0uZ 3 31 July 2011
pas_valide PHP - Filters 6% 20418 25 g0uZ 3 27 February 2011
pas_valide Node - Eval 1% 3184 30 Mhd_Root 7 24 February 2021
pas_valide XSLT - Code execution 2% 3906 30 ghozt 5 16 July 2017
pas_valide SQL injection - String 7% 22830 30 g0uZ 10 24 December 2012
pas_valide SQL injection - Authentication - GBK 3% 10324 30 dvor4x 4 2 December 2015
pas_valide SQL injection - Authentication 13% 47922 30 g0uZ 11 27 February 2011
pas_valide Ruby on Rails - ransack 1% 57 30 koma 0 23 June 2025
pas_valide Remote File Inclusion 4% 12282 30 g0uZ 8 25 November 2015
pas_valide PHP - type juggling 3% 9193 30 vic 4 10 March 2016
pas_valide PHP - preg_replace() 3% 9411 30 sambecks 4 2 March 2016
pas_valide PHP - Loose Comparison 3% 7597 30 ghozt 4 10 January 2018
pas_valide Nginx - SSRF Misconfiguration 1% 424 30 .Yo0x 1 27 September 2024
pas_valide Local File Inclusion 8% 26426 30 g0uZ 4 2 October 2011
pas_valide JWT - Header Injection 1% 1470 30 Nishacid , Mika 2 23 February 2023
pas_valide JWT - Public key 2% 4188 30 Jrmbt 5 21 August 2019
pas_valide Java - Server-side Template Injection 4% 11214 30 righettod 6 29 November 2015
pas_valide Command injection - Filter bypass 3% 8050 30 sambecks 6 20 September 2017
pas_valide GraphQL - Injection 1% 960 30 apges01 2 19 January 2023
pas_valide Flask - Development server 1% 1253 30 Sanlokii 1 29 November 2023
pas_valide File upload - ZIP 3% 10110 30 ghozt 3 3 August 2017
pas_valide Local File Inclusion - Double encoding 4% 13403 30 zM_ 4 13 June 2016
pas_valide SQL injection - Numeric 5% 15824 35 g0uZ 7 24 December 2012
pas_valide Yaml - Deserialization 1% 1563 35 Nishacid 2 20 April 2021
pas_valide XPath injection - Authentication 2% 6878 35 g0uZ 6 27 December 2012
pas_valide XML External Entity 2% 5904 35 sambecks 2 20 October 2014
pas_valide SQL Truncation 2% 7091 35 Geluchat 2 1 May 2015
pas_valide SQL Injection - Routed 2% 5693 35 soka 5 24 December 2016
pas_valide NoSQL injection - Authentication 3% 8054 35 mastho 8 31 May 2015
pas_valide PHP - Serialization 2% 7011 35 Arod 3 3 February 2014
pas_valide PHP - Path Truncation 2% 5643 35 Geluchat 7 25 March 2015
pas_valide Node - Serialize 1% 1427 35 Mhd_Root 2 24 February 2021
pas_valide LDAP injection - Authentication 3% 10764 35 g0uZ 8 26 May 2013
pas_valide JWT - Unsecure Key Handling 1% 969 35 Nishacid , Mika 5 23 February 2023
pas_valide Elixir - EEx 1% 403 35 lolo42 1 29 November 2023
pas_valide PHP - Eval - Advanced filters bypass 1% 684 40 Podalirius 2 8 July 2022
pas_valide XPath injection - String 2% 4092 40 g0uZ 5 26 May 2013
pas_valide SQL injection - File reading 2% 6192 40 Arod 3 19 October 2014
pas_valide SQL injection - Insert 1% 3342 40 sambecks 4 23 February 2015
pas_valide SQL injection - Error 3% 8399 40 sambecks 5 4 March 2015
pas_valide GraphQL - Mutation 1% 1676 40 CanardMandarin 2 20 October 2020
pas_valide PHP - Eval 2% 3835 40 chmod 10 8 November 2018
pas_valide Local File Inclusion - Wrappers 2% 3870 40 sambecks 4 2 March 2016
pas_valide Java - Spring Boot 1% 2434 40 dvor4x 3 24 December 2016
pas_valide GraphQL - Backend injection 1% 523 40 apges01 1 19 January 2023
pas_valide API - Broken Access 2 1% 670 40 Nishacid , Mika 1 18 January 2024
pas_valide File upload - Polyglot 1% 542 45 Cyxo 1 8 July 2022
pas_valide NodeJS - Prototype Pollution Bypass 1% 613 45 Worty 1 22 October 2021
pas_valide NoSQL injection - Blind 1% 3201 45 ghozt 6 26 November 2016
pas_valide SQL injection - Time based 2% 6089 45 ycam 4 11 September 2015
pas_valide SQL injection - Blind 3% 8052 50 g0uZ 6 27 February 2011
pas_valide NodeJS - vm escape 1% 822 50 Podalirius 1 15 April 2021
pas_valide Server Side Request Forgery 1% 2026 50 sambecks 7 22 June 2018
pas_valide Java - Custom gadget deserialization 1% 264 50 Elweth 0 28 December 2023
pas_valide LDAP injection - Blind 1% 3603 55 g0uZ 2 8 June 2013
pas_valide PHP - Unserialize overflow 1% 829 55 mayfly 2 4 April 2020
pas_valide PHP - Unserialize Pop Chain 1% 793 55 Worty 2 22 October 2021
pas_valide SQL Injection - Second Order 1% 275 55 k4ndar3c 1 29 November 2023
pas_valide Python - dotenv 1% 136 70 jrjgjk 1 27 September 2024
pas_valide Python - Blind SSTI Filters Bypass 1% 746 75 Podalirius 5 7 September 2021
pas_valide XPath injection - Blind 1% 2490 75 g0uZ 5 27 December 2012
pas_valide SQL injection - Filter bypass 1% 3130 80 sambecks 7 21 July 2014

Challenge Results Challenge Results

Pseudo Challenge Lang Date
huypq Web - Server  Install files en 31 August 2025 at 08:33
√¿ßz Web - Serveur  Flask - Unsecure session fr 31 August 2025 at 08:17
buggyTheHunter Web - Server  PHP - Command injection en 31 August 2025 at 08:06
buggyTheHunter Web - Server  Weak password en 31 August 2025 at 08:03
buggyTheHunter Web - Server  HTTP - User-agent en 31 August 2025 at 08:02
buggyTheHunter Web - Server  HTTP - Open redirect en 31 August 2025 at 08:01
buggyTheHunter Web - Server  HTTP - IP restriction bypass en 31 August 2025 at 07:56
buggyTheHunter Web - Server  HTML - Source code en 31 August 2025 at 07:51
hackerTheone Web - Server  JWT - Weak secret en 31 August 2025 at 06:39
hackerTheone Web - Server  JWT - Revoked token en 31 August 2025 at 06:30