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
	AST - Deobfuscation	1% 2214	35		mhoste , Lxt3h		2	27 June 2023
	Browser - bfcache / disk cache	1% 73	65		Mizu		0	28 July 2023
	CSP Bypass - Dangling markup	1% 1887	45		CanardMandarin		1	27 October 2020
	CSP Bypass - Dangling markup 2	1% 1554	50		CanardMandarin		1	27 October 2020
	CSP Bypass - Inline code	2% 6055	35		CanardMandarin		8	27 October 2020
	CSP Bypass - JSONP	1% 1506	45		CanardMandarin		5	27 October 2020
	CSP Bypass - Nonce	1% 1148	50		Ruulian		4	8 April 2022
	CSP Bypass - Nonce 2	1% 665	35		Ruulian		1	27 June 2023
	CSPT - The Ruler	1% 69	60		Rolix , Mizu		0	27 September 2024
	CSRF - 0 protection	6% 21433	35		sambecks		8	16 February 2016
	CSRF - token bypass	3% 7622	45		sambecks		8	18 February 2016
	CSS - Exfiltration	1% 697	50		Forgi , gwel		1	8 April 2022
	DOM Clobbering	1% 433	60		Mizu		1	8 April 2022
	Flash - Authentication	2% 6536	40		koma		1	18 June 2012
	HTML - disabled buttons	44% 160278	5		Final		10	16 July 2017
	HTTP Response Splitting	1% 2485	70		Arod		3	7 November 2013
	Javascript - Authentication	46% 168343	5		g0uZ		9	8 October 2006
	Javascript - Authentication 2	41% 147011	10		na5sim		4	3 February 2011
	Javascript - Native code	25% 89258	15		g0uZ		8	13 March 2011
	Javascript - Obfuscation 1	38% 139235	10		Hel0ck		10	7 October 2006
	Javascript - Obfuscation 2	33% 120477	10		Hel0ck		8	3 February 2011
	Javascript - Obfuscation 3	18% 65741	30		Hel0ck		10	4 February 2011
	Javascript - Obfuscation 4	2% 7092	50		aaSSfxxx		5	18 July 2011
	Javascript - Obfuscation 5	1% 822	70		Hel0ck		3	4 February 2011
	Javascript - Obfuscation 6	1% 129	60		n3rada		0	27 April 2023
	Javascript - Source	44% 159199	5		g0uZ		5	7 October 2006
	Javascript - Webpack	8% 28463	15		CanardMandarin		3	11 August 2020
	Relative Path Overwrite	1% 207	50		Mizu		2	28 July 2023
	Same Origin Method Execution	1% 48	90		Mizu		0	28 July 2023
	Self XSS - DOM Secrets	1% 271	55		Mizu		3	28 July 2023
	Self XSS - Race Condition	1% 108	60		Mizu		1	28 July 2023
	Web Socket - 0 protection	1% 962	35		Worty		1	22 October 2021
	XS Leaks	1% 207	75		Mizu		1	8 April 2022
	XSS - DOM Based	1% 883	85		vic		6	24 December 2016
	XSS - Reflected	2% 6665	45		pickle		6	16 March 2018
	XSS - Stored - filter bypass	1% 1598	80		Arod , sambecks		8	2 January 2016
	XSS - Stored 1	12% 42298	30		g0uZ		10	3 March 2012
	XSS - Stored 2	3% 9801	50		g0uZ		7	4 March 2012
	XSS DOM Based - AngularJS	1% 2832	40		Ruulian		3	12 August 2021
	XSS DOM Based - Eval	1% 3159	40		Ruulian		5	12 August 2021
	XSS DOM Based - Filters Bypass	1% 1632	50		Ruulian		7	12 August 2021
	XSS DOM Based - Introduction	2% 6489	35		Ruulian		4	12 August 2021

Challenge Results

Pseudo	Challenge	Lang	Date
LE4O	Javascript - Webpack		13 July 2025 at 07:59
LE4O	Javascript - Obfuscation 3		13 July 2025 at 07:23
LE4O	Javascript - Native code		13 July 2025 at 07:15
LE4O	Javascript - Obfuscation 2		13 July 2025 at 07:14
savon_ris	Javascript - Obfuscation 1		13 July 2025 at 05:44
act ii	Javascript - Authentication 2		13 July 2025 at 05:38
act ii	Javascript - Native code		13 July 2025 at 05:38
act ii	Javascript - Obfuscation 2		13 July 2025 at 05:37
act ii	Javascript - Obfuscation 3		13 July 2025 at 05:36
act ii	Javascript - Source		13 July 2025 at 05:36