how to avoid xss

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PHP and XSS cross-site attack _ PHP Tutorial

PHP and XSS cross-site attacks. In fact, this topic has been mentioned for a long time, and many PHP sites in China are found to have XSS vulnerabilities. I accidentally saw an XSS vulnerability in PHP5 today. here is a summary. By the way, PHP5 friends In fact, this topic has been mentioned for a long time, and many PHP sites in China are found to have

Technology sharing: How to Use File Upload to execute XSS?

Technology sharing: How to Use File Upload to execute XSS? ExploitationFile UploadImplement XSS attacksIs a HackingThere are good opportunities for Web applications, especially in the case of ubiquitous upload of user portraits, which gives us many opportunities to discover developers' errors. Basic File Upload XSS attacks include.1) file name The file name itsel

Two winning software xss (detailed analysis)

Author: Enter www.anying.org to repost, which must be notedDig a few xss posts.The software xss won the bid (Sister's linux was developed by China .. The website is not secure)1: http://www.cs2c.com.cn/search.php? Searchword = Enter a self-constructed feature character on the page. Look... Aaaaaaaa is output Let's try to see if there is any filtering. Look .. No Filtering You can enter

Demonstration of getting Cookie information by using XSS

A friend posted a post using the background XSS the day before, and everyone discussed it together: http://www.bkjia.com/Article/201203/124644.htmlThis post is only about the idea, not very detailed, and uses the background XSS Trojan, but in fact, the background Trojan will not involve XSS, it is just a problem of filtering, not filtering, not converting. For ex

DEDECMS full-version gotopage variable xss rootkit 0DAY and repair

Affected Versions: DEDECMS full version Vulnerability description: The gotopage variable in the DEDECMS background login template does not validate incoming data effectively, resulting in an XSS vulnerability. \ Dede \ templets \ login.htm About 65 lines Due to the global variable registration mechanism of DEDECMS, the content of this variable can be overwritten by the COOKIE variable, and the COOKIE can be stored persistently on the client, resulti

Front-end firewall for XSS vulnerabilities: ready for release

So far, we have listed all solutions that can defend against XSS using front-end scripts. Although it seems complicated and cumbersome, it is not necessary to implement it in theory. Our goal is only to provide early warnings and discover problems, rather than achieving zero drops of water. In fact, HTML5 has already developed a browser XSS solution-Content Security Policy, and most mainstream browsers have

Vulnerability Analysis: a persistent XSS vulnerability in the Markdown parser

Vulnerability Analysis: a persistent XSS vulnerability in the Markdown parser What is Markdown? Markdown is a lightweight markup language. The popularity of Markdown has been widely supported by GitHub and Stack Overflow. as an ordinary person, we can also get started easily. Using markdown to write articles is awesome. You can leave all the trivial HTML tags behind. In the past five years, markdown has received a lot of attention. Many applications

XSS Cross-site scripting attacks and defense reading notes (original)

XSS can execute arbitrary JS code in client executionHow to use 0x01 XSS1. Fishing Case: http://www.wooyun.org/bugs/wooyun-2014-076685 How I scan the intranet and creep to the front desk via an XSS detection Sohu intranet2. Fishing, forged operation interface FishingDirect jumpIFRAME FishingFlash Fishinghttp://www.wooyun.org/bugs/wooyun-2010-025323. Projectile Advertising Brush Flow4. Any post/get operation

Microsoft OAuth interface XSS can affect User Account Security

Microsoft OAuth interface XSS can affect User Account Security One day, when I browsed Twitter information, I found a very interesting article, a CSRF vulnerability discovered by Wesley Wineberg on the Microsoft OAuth interface. This article also aroused my curiosity and confidence in finding another vulnerability in this place (The author is as confident as the mystery). Therefore, I plan to analyze this authentication interface in depth.First, to us

The Haier community XSS vulnerability allows you to directly log on to another user's account (and possibly log on to the APP to control users' smart devices)

The Haier community XSS vulnerability allows you to directly log on to another user's account (and possibly log on to the APP to control users' smart devices) 1. register two accounts, one for xss and the other for victims. log on to the two accounts in two browsers to simulate two users.2. Make one account send a private message to another account, and insert xss

Understand XSS attack principles

Understand XSS attack principles After reading the HTML security list written by cool shell I suddenly wanted to write a quick tutorial on XSS. Let more people know what XSS security vulnerabilities are Before understanding XSS, you must know the principle of "session ". Simply put, after a member successfully

Interesting Game: Google XSS Game

Google recently launched an XSS game: Https://xss-game.appspot.com/ It took me two or three hours to get the result .. The rule of this game is that you only need to pop up the alert window on the attack webpage. The question page is nested in iframe, so how does the parent window know that the window is successfully displayed in iframe? Is implemented in this way: This js is loaded on the question page, an

Share some ideas about XSS penetration

The cookie of the main site is protected by httponly.1. Find the XSS of the subdomain A. XX. COM. The xss filter can be used, but the server is ngnix.2. find another subdomain B. XX. COM's PHP global variable XSS. This server is an old apache version and can expose cookies by 400 Error. However, this XSS can only be ur

[Something About Self-Only XSS]

CnCxzSec's Blog Today, I saw an article Exploitation of "Self-Only" XSS in Google Code in exploit-db, which is about the "cross-Self XSS" on Google Code ". In the past, I found that some mainstream domestic mailboxes "only cross-user XSS" were found. After reporting, the official team thought it was harmless. I used to think that too. UnlessIn extreme casesFor ex

Introduction to XSS

1. What is XSS? XSS attacks: XSS attacks are web application attacks. Attackers attempt to inject malicious script code to a trusted Website for malicious operations. In cross-site scripting attacks, malicious code is executed on the affected user's browser and affects the user. 2. What can XSS do? Many people think th

Use the rich text filter HTMLPurifier in PHP to prevent xss cross-site attacks

CMS will integrate online editors such as FCKEditor in the background for editing content, but this is very easy for XSS cross-site attacks. let's take a look at how HTMLPurifier can prevent xss cross-site attacks. with html visualization... CMS integrates online editors, such as FCKEditor, in the background to edit the content of the article. However, this is very easy for cross-site

"Notes" NetEase micro-professional-web security Engineer -04.web Security Combat -9.XSS

XSS: Cross site script attack, which we mentioned earlier, refers to an attacker entering (passing in) malicious HTML code into a Web site with an XSS vulnerability, and this HTML code executes automatically when other users browse the site. So as to achieve the purpose of the attack. For example, theft of user cookies, destruction of page structure, redirection to other websites, etc. In theory, there is a

XSS Front-end Firewall (4): Seamless protection

For example, our attribute hooks only consider setAttribute, but ignore similar setattributenode. Although this method has never been used, it does not mean that others cannot use it.For example, creating an element is usually a createelement, in fact Createelementns is also possible. You can even use ready-made elements to cloneNode and achieve your goals. Therefore, these are all marginal approaches that are worth considering.Here we review the monitoring points discussed previously.Inline Eve

HttpOnly prevent JavaScript from reading cookies when preventing XSS

If the cookie is set with the HTTPONLY flag, you can avoid javascript from reading cookies when XSS occurs, which is why HttpOnly was introduced.Implementation method:Settings in PHP1. In the php.iniSession.cookie_httponly = True2. Global settings in the program:Ini_set ("Session.cookie_httponly", 1);OrSession_set_cookie_params (0, NULL, NULL, NULL, TRUE);?>The 3.Cookie operator function Setcookie function

Asp.net cross-site scripting attack XSS instance sharing

Asp.net cross-site scripting attack XSS instance sharingAsp.net cross-site scripting attack XSS instance sharing Common attack code: http://target/vuln-search.aspx?term= XSS script list: https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet Defense XSS list: https://www.owasp.org/index.php/XSS_ (Cross_Site_S

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