Collaborate Disseminate
This bundle has nine interactive courses to help you learn a variety of high-demand coding skills faster and easier.
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Continue reading Learn how to code with interactive training for only $40
I was recently surprised to learn that CSS2+ is Turing complete, and hence it is potentially dangerous, from the information security standpoint, to open websites containing CSS. That being said, if a corporate policy, for example, has a s… Continue reading Is it possible to enforce CSS1 in browsers? [migrated]
I was wondering if it’s possible to kick off a network call by manipulating the style tag on an element outside the DOM (which could lead to potential SSRF if this were done server-side). I’ve tried a number of ideas like setting content: … Continue reading Load url from CSS applied to element outside DOM
As the available computing power from affordable microcontrollers continues to increase, there is an inevitable blurring of the line between them and the lower tier of application processors capable of …read more Continue reading Render HTML And CSS On An ESP32
In a scenario where an attacker has control over the src attribute of an img HTML tag, they could easily inject a simple JavaScript XSS payload like the following:
<img src="javascript:alert(1)">
The attacker can not manag… Continue reading Can XSS ever occur in an <img> tag’s "src" attribute?
I was browsing a German website when I noticed that during the initial page load there were some non printable characters displayed on the page (like “). As a result the score of the match can’t be seen while the page is still fetching al… Continue reading HTML obfuscation using special fonts [migrated]
Google provides a CSP evaluator to validate if a given content-security policy is well set up (github, validator). However, if one uses ‘unsafe-inline’ in the style-src directive this is reported as ‘all good’ (See image below).
Does this … Continue reading Google CSP Evaluator and style-src ‘unsafe-inline’
We have a web service where logged in users can create web page content and write custom CSS for their pages. All the HTML goes through a whitelist parser and doesn’t allow any executable content. All the CSS is put through a whitelist par… Continue reading Is it safe to allow CSS filter: url(data:<SVG SOURCE HERE>)?
Hello I was experimenting with XSS payloads and couldn’t help wonder the syntax for
javascript:alert(0)
The most basic payload for XSS makes sense, since the tag is used for JavaScript in HTML.
<script>alert(0)</script>
But … Continue reading XSS Payloads: <script> vs javascript:
Say I have a continuously upgraded and well maintained LAMP environment with a website which its CMS is all-core and continuously upgraded as well and I have created a simple backend HTML contact form which is CMS-agnostic (not a module of… Continue reading Is it true that frontend validation is generally redundant for minimalist contact forms on minimalist environments?