Lazysizes Code Review

ISGroup SRL performed an automated Code Review (not a real Static Analysis, more a grep-on-steroid) of this NodeJS project in order to identify potential security vulnerabilities. We do not guarantee that all the findings are valid, and for sure there are plenty of false-positives and false-negatives (undetected issues) but it's free and your project could benefit from this security analisys. The following data is also available in JSON format!

Possible Security Issues

Issue	Description	Line	File
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	lazysizes.min.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	lazysizes-umd.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	168	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	193	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	210	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	220	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	419	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	487	lazysizes-umd.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	526	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	541	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	656	lazysizes-umd.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	166	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	191	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	208	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	218	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	417	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	485	lazysizes.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	524	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	539	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	654	lazysizes.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	11	assets/js/bootstrap.min.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	11	assets/js/bootstrap.min.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	68	assets/js/bootstrap.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	157	assets/js/bootstrap.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	277	assets/js/bootstrap.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	82	plugins/attrchange/ls.attrchange.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/attrchange/ls.attrchange.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	151	plugins/parent-fit/ls.parent-fit.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/parent-fit/ls.parent-fit.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	67	plugins/custommedia/ls.custommedia.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/custommedia/ls.custommedia.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	87	plugins/unload/ls.unload.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	134	plugins/unload/ls.unload.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/unload/ls.unload.min.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/unload/ls.unload.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/optimumx/ls.optimumx.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	203	plugins/optimumx/ls.optimumx.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	22	plugins/static-gecko-picture/ls.static-gecko-picture.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	29	plugins/static-gecko-picture/ls.static-gecko-picture.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	44	plugins/static-gecko-picture/ls.static-gecko-picture.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/static-gecko-picture/ls.static-gecko-picture.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	44	plugins/include/ls.include.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	103	plugins/include/ls.include.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	406	plugins/include/ls.include.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/include/ls.include.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/bgset/ls.bgset.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	121	plugins/bgset/ls.bgset.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/respimg/ls.respimg.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	181	plugins/respimg/ls.respimg.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/aspectratio/ls.aspectratio.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	82	plugins/aspectratio/ls.aspectratio.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	197	plugins/aspectratio/ls.aspectratio.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	2	plugins/noscript/ls.noscript.min.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	42	plugins/noscript/ls.noscript.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	160	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	185	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	202	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	212	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	411	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	479	src/lazysizes-core.js
Server Side Injection(SSI) - setInterval()	User controlled data in 'setInterval()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	518	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	533	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	648	src/lazysizes-core.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	77	tests/functional-tests-plugins.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	96	tests/functional-tests-plugins.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	510	tests/functional-tests-plugins.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	55	tests/test-helper.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	57	tests/test-helper.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	51	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	55	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	92	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	96	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	167	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	191	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	500	tests/functional-tests.js
Server Side Injection(SSI) - setTimeout()	User controlled data in 'setTimeout()' can result in Server Side Injection (SSI) or Remote Code Execution (RCE).	504	tests/functional-tests.js

Issue	Description
Missing Security Header - X-Frame-Options (XFO)	X-Frame-Options (XFO) header provides protection against Clickjacking attacks.
Missing Security Header - Content-Security-Policy (CSP)	Content Security Policy (CSP), a mechanism web applications can use to mitigate a broad class of content injection vulnerabilities, such as cross-site scripting (XSS). CSP Header was not found.
Missing Security Header - Strict-Transport-Security (HSTS)	Strict-Transport-Security (HSTS) header enforces secure (HTTP over SSL/TLS) connections to the server.
Missing 'httpOnly' in Cookie	JavaScript can access Cookies if they are not marked httpOnly.
Infromation Disclosure - X-Powered-By	Remove the X-Powered-By header to prevent information gathering.
Missing Security Header - X-Content-Type-Options	X-Content-Type-Options header prevents Internet Explorer and Google Chrome from MIME-sniffing a response away from the declared content-type.
Missing Security Header - X-Download-Options: noopen	X-Download-Options header set to noopen prevents IE users from directly opening and executing downloads in your site's context.
Missing Security Header - X-XSS-Protection:1	X-XSS-Protection header set to 1 enables the Cross-site scripting (XSS) filter built into most recent web browsers.
Missing Security Header - Public-Key-Pins (HPKP)	Public-Key-Pins (HPKP) ensures that certificate is Pinned.

Node.Security

Security Audit of Lazysizes