HtmlSanitizer | Cleans HTML to avoid XSS attacks

by mganss C# Version: v8.0.645 License: MIT

X-Ray Key Features Code Snippets Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | HtmlSanitizer Summary

HtmlSanitizer is a C# library. HtmlSanitizer has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

[Sonarcloud Quality Gate] HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to [XSS attacks] It uses [AngleSharp] to parse, manipulate, and render HTML and CSS. Because HtmlSanitizer is based on a robust HTML parser it can also shield you from deliberate or accidental "tag poisoning" where invalid HTML in one fragment can corrupt the whole document leading to broken layout or style.

Support

Quality

Security

License

Reuse

Support

HtmlSanitizer has a medium active ecosystem.

It has 1358 star(s) with 190 fork(s). There are 51 watchers for this library.

It had no major release in the last 12 months.

There are 23 open issues and 237 have been closed. On average issues are closed in 96 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of HtmlSanitizer is v8.0.645

Quality

HtmlSanitizer has 0 bugs and 0 code smells.

Security

HtmlSanitizer has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

HtmlSanitizer code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

HtmlSanitizer is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

HtmlSanitizer releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 13821 lines of code, 0 functions and 11 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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HtmlSanitizer Key Features

No Key Features are available at this moment for HtmlSanitizer.

HtmlSanitizer Examples and Code Snippets

No Code Snippets are available at this moment for HtmlSanitizer.

Community Discussions

Trending Discussions on HtmlSanitizer

AddScoped: How to call the right constructor function?

How to use t3:// TypoLinks in TYPO3 HTML Content Elements without disabling `parseFunc.htmlSanitize` globally?

Why are these tags removed with MGans's HtmlSanitizer?

CORS Issue with Dotnet 5 Web Api

.net 5 - Signalr - Messagepack - lz4 - Error: unable to find ext type 98

QUESTION

AddScoped: How to call the right constructor function?

Asked 2021-Sep-17 at 20:02

I am looking for the correct C# code to inject this service in ASP.NET 5 MVC (core) in a way the defaults for the class apply.

If I add the scoped service below, the instance field values are empty. If I do var a = new HtmlSanitizer();, instance fields are populated with non-null defaults like "a long string of values".

...

ANSWER

Answered 2021-Sep-17 at 20:02

This actually has less to do with HtmlSanitizer specifically and more to do with how .NET Core Constructor Dependency Injection works.

Per the documentation:

Services can be resolved by using:

IServiceProvider

ActivatorUtilities:

Creates objects that aren't registered in the container.

Used with some framework features.

Constructors can accept arguments that aren't provided by dependency injection, but the arguments must assign default values.

When services are resolved by IServiceProvider or ActivatorUtilities, constructor injection requires a public constructor.

When services are resolved by ActivatorUtilities, constructor injection requires that only one applicable constructor exists. Constructor overloads are supported, but only one overload can exist whose arguments can all be fulfilled by dependency injection.

In this context, you are using the IServiceProvider and the framework can "visit" arguments that are specifically of type IEnumerable, which is what is required by the HtmlSanitizer constructor:

Source https://stackoverflow.com/questions/69227941

QUESTION

How to use t3:// TypoLinks in TYPO3 HTML Content Elements without disabling `parseFunc.htmlSanitize` globally?

Asked 2021-Sep-10 at 19:32

Since the release of the security patches in August 2021 that prevents Cross-Site Scripting via Rich-Text Content I noticed that the output of HTML Content Elements suddenly changed in our projects. Some tag attributes and tags got removed by the newly introduced HTML Sanitizer (when the template is modified so that t3:// style TypoLinks get rendered).

So simply overriding the default Html.html Fluid Template, changing the to and adding a html decoding like in the following example is no longer sufficient.

...

ANSWER

Answered 2021-Sep-10 at 19:25

Simply make a copy of lib.parseFunc and disable the sanitizer in this copy.

Source https://stackoverflow.com/questions/69122752

QUESTION

Why are these tags removed with MGans's HtmlSanitizer?

Asked 2021-Jun-23 at 18:24

I am thinking of using the HtmlSanitizer Nuget package by MGans for sanitizing input and output on our application. Given the below input and applying the Sanitize() method, the following is returned:

Input:

...

ANSWER

Answered 2021-Jun-23 at 18:24

In HTML4 and HTML5, tag is its ending tag.

A browser would treat the slash as malformed input and ignore it, then execute the contents after it as JavaScript code.

Source https://stackoverflow.com/questions/68098551

QUESTION

CORS Issue with Dotnet 5 Web Api

Asked 2021-May-17 at 23:46

I have a dotnet 5 web API with an Angular2+ front end, which I'm building from a previous 3.1 MVC version of the app. I'm having an issue with CORS while looking to authenticate with Yahoo that I did not have with the MVC version. The error I am getting is:

"Access to XMLHttpRequest at 'https://api.login.yahoo.com...' (redirected from 'https://localhost:5003/api/draft/yahooauth/') from origin 'https://localhost:5003' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource."

My API Controller:

...

ANSWER

Answered 2021-May-16 at 19:27

Try to use this syntax and move AddCors to the top of ConfigureServices. Assign name to UseRouting.

Source https://stackoverflow.com/questions/67559215

QUESTION

.net 5 - Signalr - Messagepack - lz4 - Error: unable to find ext type 98

Asked 2020-Dec-01 at 16:10

Got this error un .net core 5 solution with angular client after enabling lz4BlockArray compression. Without compression everithing seems to work pretty fine. Looking around for motivation but i found nothing. Seems like some decoders aren't loaded correctly.

That's client side error, no server side error

...

ANSWER

Answered 2020-Dec-01 at 16:10

From the .NET MessagePack libraries README

MessagePackCompression has two modes, Lz4Block and Lz4BlockArray. Neither is a simple binary LZ4 compression, but a special compression integrated into the serialization pipeline, using MessagePack ext code (Lz4BlockArray (98) or Lz4Block (99)). Therefore, it is not readily compatible with compression offered in other languages.

The important part is the last sentence, other languages might not be compatible. And in this case the Angular client is using a MessagePack library that doesn't support these ext codes for compression.

Source https://stackoverflow.com/questions/65087721

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install HtmlSanitizer

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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