Web - Client

Client-side technologies implemented in the web browser

At first you will be faced with problems that will require little to no knowledge of web scripting language. Pretty soon the plot thickens ...

These challenges confront you to the use of scripting languages and client-side programming. They are mostly scripts to analyze and understand. This will allow you to learn languages which are in widespread use on the internet.

Prerequisites:
– Understanding a scripting language such javascript/vbscript
– Understanding the operation of a debugger such firebug/javascript console

42 Challenges

Results	Name	Validations	Number of points	Difficulty	Author	Note	Solution	Date
	HTML - disabled buttons	44% 160023	5		Final		10	16 July 2017
	Javascript - Authentication	46% 168098	5		g0uZ		9	8 October 2006
	Javascript - Source	44% 158999	5		g0uZ		5	7 October 2006
	Javascript - Authentication 2	41% 146821	10		na5sim		4	3 February 2011
	Javascript - Obfuscation 1	38% 139062	10		Hel0ck		10	7 October 2006
	Javascript - Obfuscation 2	33% 120317	10		Hel0ck		8	3 February 2011
	Javascript - Native code	25% 89139	15		g0uZ		8	13 March 2011
	Javascript - Webpack	8% 28375	15		CanardMandarin		3	11 August 2020
	Javascript - Obfuscation 3	18% 65644	30		Hel0ck		10	4 February 2011
	XSS - Stored 1	12% 42238	30		g0uZ		10	3 March 2012
	AST - Deobfuscation	1% 2172	35		mhoste , Lxt3h		2	27 June 2023
	CSP Bypass - Inline code	2% 6024	35		CanardMandarin		8	27 October 2020
	CSP Bypass - Nonce 2	1% 657	35		Ruulian		1	27 June 2023
	CSRF - 0 protection	6% 21402	35		sambecks		8	16 February 2016
	Web Socket - 0 protection	1% 957	35		Worty		1	22 October 2021
	XSS DOM Based - Introduction	2% 6467	35		Ruulian		4	12 August 2021
	Flash - Authentication	2% 6524	40		koma		1	18 June 2012
	XSS DOM Based - AngularJS	1% 2818	40		Ruulian		3	12 August 2021
	XSS DOM Based - Eval	1% 3144	40		Ruulian		5	12 August 2021
	CSP Bypass - Dangling markup	1% 1872	45		CanardMandarin		1	27 October 2020
	CSP Bypass - JSONP	1% 1499	45		CanardMandarin		5	27 October 2020
	CSRF - token bypass	3% 7604	45		sambecks		8	18 February 2016
	XSS - Reflected	2% 6650	45		pickle		6	16 March 2018
	CSP Bypass - Dangling markup 2	1% 1546	50		CanardMandarin		1	27 October 2020
	CSP Bypass - Nonce	1% 1137	50		Ruulian		4	8 April 2022
	CSS - Exfiltration	1% 692	50		Forgi , gwel		1	8 April 2022
	Javascript - Obfuscation 4	2% 7079	50		aaSSfxxx		5	18 July 2011
	Relative Path Overwrite	1% 205	50		Mizu		1	28 July 2023
	XSS - Stored 2	3% 9783	50		g0uZ		7	4 March 2012
	XSS DOM Based - Filters Bypass	1% 1625	50		Ruulian		7	12 August 2021
	Self XSS - DOM Secrets	1% 269	55		Mizu		3	28 July 2023
	CSPT - The Ruler	1% 67	60		Rolix , Mizu		0	27 September 2024
	DOM Clobbering	1% 424	60		Mizu		1	8 April 2022
	Javascript - Obfuscation 6	1% 126	60		n3rada		0	27 April 2023
	Self XSS - Race Condition	1% 107	60		Mizu		1	28 July 2023
	Browser - bfcache / disk cache	1% 69	65		Mizu		0	28 July 2023
	HTTP Response Splitting	1% 2482	70		Arod		3	7 November 2013
	Javascript - Obfuscation 5	1% 819	70		Hel0ck		3	4 February 2011
	XS Leaks	1% 205	75		Mizu		1	8 April 2022
	XSS - Stored - filter bypass	1% 1591	80		Arod , sambecks		8	2 January 2016
	XSS - DOM Based	1% 879	85		vic		6	24 December 2016
	Same Origin Method Execution	1% 47	90		Mizu		0	28 July 2023

Challenge Results

Pseudo	Challenge	Lang	Date
mrpen	Javascript - Obfuscation 1		5 July 2025 at 23:34
mrpen	Javascript - Authentication 2		5 July 2025 at 23:32
NoJamesHere	Javascript - Source		5 July 2025 at 23:32
NoJamesHere	Javascript - Authentication		5 July 2025 at 23:30
NoJamesHere	HTML - disabled buttons		5 July 2025 at 23:28
Neyzar	CSRF - 0 protection		5 July 2025 at 23:28
smilebackdoor	XSS - Stockée 2		5 July 2025 at 23:27
elpr3z	Javascript - Obfuscation 1		5 July 2025 at 23:26
mrpen	Javascript - Source		5 July 2025 at 23:24
Nektow	XSS - Volatile		5 July 2025 at 23:23