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 Ruby on Rails - ransack 1% 52 30 koma 0 23 June 2025
pas_valide Java - Custom gadget deserialization 1% 253 50 Elweth 0 28 December 2023
pas_valide NodeJS - Prototype Pollution Bypass 1% 612 45 Worty 1 22 October 2021
pas_valide File upload - Polyglot 1% 536 45 Cyxo 1 8 July 2022
pas_valide Nginx - Root Location Misconfiguration 1% 1665 15 .Yo0x 1 27 September 2024
pas_valide API - Broken Access 2 1% 652 40 Nishacid , Mika 1 18 January 2024
pas_valide NodeJS - vm escape 1% 819 50 Podalirius 1 15 April 2021
pas_valide GraphQL - Backend injection 1% 515 40 apges01 1 19 January 2023
pas_valide Flask - Unsecure session 1% 3269 20 Sanlokii 1 29 November 2023
pas_valide Elixir - EEx 1% 393 35 lolo42 1 29 November 2023
pas_valide SQL Injection - Second Order 1% 272 55 k4ndar3c 1 29 November 2023
pas_valide Python - dotenv 1% 130 70 jrjgjk 1 27 September 2024
pas_valide Flask - Development server 1% 1233 30 Sanlokii 1 29 November 2023
pas_valide Nginx - SSRF Misconfiguration 1% 395 30 .Yo0x 1 27 September 2024
pas_valide PHP - register globals 5% 16394 25 g0uZ 2 8 October 2011
pas_valide JWT - Header Injection 1% 1451 30 Nishacid , Mika 2 23 February 2023
pas_valide Yaml - Deserialization 1% 1555 35 Nishacid 2 20 April 2021
pas_valide GraphQL - Mutation 1% 1669 40 CanardMandarin 2 20 October 2020
pas_valide PHP - Eval - Advanced filters bypass 1% 679 40 Podalirius 2 8 July 2022
pas_valide API - Mass Assignment 2% 3734 20 Nishacid , Mika 2 18 January 2024
pas_valide XML External Entity 2% 5885 35 sambecks 2 20 October 2014
pas_valide Node - Serialize 1% 1416 35 Mhd_Root 2 24 February 2021
pas_valide SQL Truncation 2% 7067 35 Geluchat 2 1 May 2015
pas_valide PHP - Unserialize Pop Chain 1% 781 55 Worty 2 22 October 2021
pas_valide PHP - Unserialize overflow 1% 823 55 mayfly 2 4 April 2020
pas_valide LDAP injection - Blind 1% 3595 55 g0uZ 2 8 June 2013
pas_valide GraphQL - Injection 1% 949 30 apges01 2 19 January 2023
pas_valide Directory traversal 10% 36584 25 g0uZ 3 31 July 2011
pas_valide Java - Spring Boot 1% 2431 40 dvor4x 3 24 December 2016
pas_valide JWT - Unsecure File Signature 1% 2686 25 Nishacid , Mika 3 23 February 2023
pas_valide PHP - Serialization 2% 6995 35 Arod 3 3 February 2014
pas_valide PHP - Filters 6% 20382 25 g0uZ 3 27 February 2011
pas_valide SQL injection - File reading 2% 6160 40 Arod 3 19 October 2014
pas_valide File upload - ZIP 3% 10079 30 ghozt 3 3 August 2017
pas_valide Nginx - Alias Misconfiguration 1% 3359 15 .Yo0x 3 27 September 2024
pas_valide SQL injection - Authentication - GBK 3% 10294 30 dvor4x 4 2 December 2015
pas_valide Local File Inclusion 8% 26379 30 g0uZ 4 2 October 2011
pas_valide PHP - preg_replace() 3% 9389 30 sambecks 4 2 March 2016
pas_valide PHP - type juggling 3% 9171 30 vic 4 10 March 2016
pas_valide Local File Inclusion - Double encoding 4% 13362 30 zM_ 4 13 June 2016
pas_valide PHP - Loose Comparison 3% 7580 30 ghozt 4 10 January 2018
pas_valide Local File Inclusion - Wrappers 2% 3851 40 sambecks 4 2 March 2016
pas_valide File upload - Null byte 7% 24827 25 g0uZ 4 26 December 2012
pas_valide API - Broken Access 2% 6125 15 Nishacid , Mika 4 18 January 2024
pas_valide SQL injection - Time based 2% 6074 45 ycam 4 11 September 2015
pas_valide XSS - Server Side 1% 3250 20 Elf 4 23 June 2023
pas_valide GraphQL - Introspection 2% 4291 20 apges01 4 19 January 2023
pas_valide SQL injection - Insert 1% 3330 40 sambecks 4 23 February 2015
pas_valide PHP - Apache configuration 1% 2770 25 erk3 , nemoz 4 8 July 2022
pas_valide PHP - Remote Xdebug 1% 1584 25 mayfly 4 18 March 2020
pas_valide SQL injection - Error 3% 8360 40 sambecks 5 4 March 2015
pas_valide JWT - Introduction 5% 18386 20 Kn0wledge 5 21 August 2019
pas_valide XPath injection - String 2% 4086 40 g0uZ 5 26 May 2013
pas_valide JWT - Public key 2% 4164 30 Jrmbt 5 21 August 2019
pas_valide XSLT - Code execution 2% 3895 30 ghozt 5 16 July 2017
pas_valide JWT - Unsecure Key Handling 1% 958 35 Nishacid , Mika 5 23 February 2023
pas_valide Python - Blind SSTI Filters Bypass 1% 738 75 Podalirius 5 7 September 2021
pas_valide XPath injection - Blind 1% 2479 75 g0uZ 5 27 December 2012
pas_valide SQL Injection - Routed 2% 5676 35 soka 5 24 December 2016
pas_valide NoSQL injection - Blind 1% 3190 45 ghozt 6 26 November 2016
pas_valide XPath injection - Authentication 2% 6866 35 g0uZ 6 27 December 2012
pas_valide SQL injection - Blind 3% 8039 50 g0uZ 6 27 February 2011
pas_valide HTML - Source code 48% 175641 5 g0uZ 6 3 October 2006
pas_valide Insecure Code Management 4% 14456 20 Swissky 6 29 September 2019
pas_valide PHP - Path Truncation 2% 5630 35 Geluchat 6 25 March 2015
pas_valide Java - Server-side Template Injection 4% 11171 30 righettod 6 29 November 2015
pas_valide Command injection - Filter bypass 3% 8021 30 sambecks 6 20 September 2017
pas_valide JWT - Revoked token 2% 6647 25 ArnC 6 20 March 2020
pas_valide JWT - Weak secret 4% 12794 25 Jrmbt 7 21 August 2019
pas_valide Weak password 31% 113484 10 g0uZ 7 3 October 2006
pas_valide HTTP - Directory indexing 22% 79758 15 g0uZ 7 7 October 2006
pas_valide Server Side Request Forgery 1% 2015 50 sambecks 7 22 June 2018
pas_valide Install files 13% 45179 15 g0uZ 7 7 October 2006
pas_valide CRLF 9% 32655 20 g0uZ 7 31 July 2011
pas_valide SQL injection - Numeric 5% 15788 35 g0uZ 7 24 December 2012
pas_valide SQL injection - Filter bypass 1% 3119 80 sambecks 7 21 July 2014
pas_valide Python - Server-side Template Injection Introduction 2% 5071 25 Podalirius 7 7 September 2021
pas_valide Node - Eval 1% 3167 30 Mhd_Root 7 24 February 2021
pas_valide HTTP - Cookies 13% 47135 20 g0uZ 8 7 October 2006
pas_valide HTTP - IP restriction bypass 9% 31928 10 Cyrhades 8 23 March 2021
pas_valide Remote File Inclusion 4% 12256 30 g0uZ 8 25 November 2015
pas_valide NoSQL injection - Authentication 3% 8034 35 mastho 8 31 May 2015
pas_valide LDAP injection - Authentication 3% 10747 35 g0uZ 8 26 May 2013
pas_valide HTTP - Headers 16% 56532 15 Arod 9 11 January 2015
pas_valide HTTP - Open redirect 19% 69302 10 Swissky 10 2 August 2017
pas_valide HTTP - User-agent 24% 86977 10 g0uZ 10 3 October 2006
pas_valide PHP - Command injection 19% 69435 10 sambecks 10 20 September 2017
pas_valide Backup file 16% 55862 15 g0uZ 10 27 February 2011
pas_valide PHP - assert() 5% 16083 25 Birdy42 10 26 November 2016
pas_valide HTTP - POST 14% 51479 15 Th1b4ud 10 14 August 2018
pas_valide SQL injection - String 7% 22776 30 g0uZ 10 24 December 2012
pas_valide PHP - Eval 2% 3821 40 chmod 10 8 November 2018
pas_valide HTTP - Verb tampering 13% 47852 15 g0uZ 10 3 February 2011
pas_valide File upload - Double extensions 10% 36156 20 g0uZ 10 24 December 2012
pas_valide File upload - MIME type 8% 29171 20 g0uZ 10 26 December 2012
pas_valide HTTP - Improper redirect 12% 44040 15 Arod 10 26 November 2014
pas_valide SQL injection - Authentication 13% 47840 30 g0uZ 11 27 February 2011

Challenge Results Challenge Results

Pseudo Challenge Lang Date
Mathys.T Web - Serveur  API - Mass Assignment fr 15 August 2025 at 00:56
abdel Web - Serveur  SQL injection - String fr 15 August 2025 at 00:44
Mathys.T Web - Serveur  API - Broken Access fr 15 August 2025 at 00:38
cnaw Web - Server  File upload - Double extensions en 15 August 2025 at 00:38
abdel Web - Serveur  SQL injection - Authentification - GBK fr 15 August 2025 at 00:32
Argon Web - Serveur  Local File Inclusion - Wrappers fr 15 August 2025 at 00:30
cnaw Web - Server  Directory traversal en 15 August 2025 at 00:15
cnaw Web - Server  HTTP - Improper redirect en 15 August 2025 at 00:12
cnaw Web - Server  Install files en 15 August 2025 at 00:10
B4NT3 Web - Server  HTML - Source code es 15 August 2025 at 00:06