how to fix cross site scripting vulnerability in php

Affected Versions:E107 website system 0.7.16 vulnerability description: E107 is a content management system written in php. The following modules of e107 do not fully filter user submitted variables: -Submitnews. php-Usersettings. php.-E107_admin/newpost. php.-E107_admin/

Php prevents cross-site request forgery. CSRF vulnerabilities outside the site are actually external data submission issues in the traditional sense. generally, programmers will consider adding watermarks to some forms such as comments to prevent SPAM problems, however, for CSRF off-

The prevention of cross-site PHP and XSS attacks has long been discussed, and many PHP sites in China have discovered XSS vulnerabilities. I accidentally saw an XSS vulnerability in PHP5 today. here is a summary. By the way, it is recommended that you use PHP5 to install a p

Nginx Multiple virtual machines web site Anti-Cross station is the primary task, PHP5.3 version does not support Open_basedir, only through the control php-cgi process and directory user rights restrictions to prevent cross-station access. First of all, to understand the normal operation of the

Parse the PHP cross-site ticket collection implementation code. To put it bluntly, copy the code below: functioncurlrequest ($ url, $ postfield, $ referer, $ cookie) {www.jb51.net $ iprand (100,244 )... rand (100,244 ). let's talk about the code. The code is as follows: Function curlrequest ($ url, $ postfield, $ referer = '', $ cookie = ''){// Http://www.jb51.

form that was recently called. Take a look at the following code that applies the changes to the preceding precedent: CODE: With these simple modifications, a cross-site request forgery attack must include a valid verification code to fully mimic the form submission. Since the verification code is saved in the user's session, the attacker must use a different verification code for each victim. This effe

Many of the domestic forums have cross-site scripting vulnerabilities, foreign also a lot of such examples, even Google has appeared, but in early December amended. (Editor's note: For cross-site scripting vulnerability attacks, readers can refer to the "detailed XSS

browsers request these resources. When you access the http://www.google.com (Figure 2-1), your browser will first request the resource identified by this URL. You can view the returned content of the request by viewing the source file (HTML) of the page. After the returned content is parsed in the browser, the Google logo image is found. The image is represented by the IMG tag of HTML, and the src attribute of the tag represents the URL of the image. The browser then sends a request to the im

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, it is recommended that you use PHP5 to install a patch or upgrade it.If you don't know what XSS is, you can read it here or here (Chinese may be better understood ).Many forums in China have

2.4. XSS attacks Cross-site Scripting is one of the well-known attack methods. Web applications on all platforms are deeply affected, and PHP applications are no exception. All Input Applications face risks. Webmail, forums, message books, and even blogs. In fact, most web applications provide input for more popular purposes, but it also puts itself at risk.

This article mainly introduces the principles and defense techniques of php cross-site attacks. It is a very practical technique to analyze php cross-site attacks in detail with specific examples, for more information, see This ar

This article mainly introduces the principles and defense techniques of php cross-site attacks. it is a very practical technique to analyze php cross-site attacks in detail with specific examples, for more information about the pr

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 th

This time to bring you PHP implementation to prevent cross-site and XSS attack steps in detail, PHP implementation to prevent cross-site and XSS attacks on the attention of what, the following is the actual case, take a look. Doc

counterfeit cross-site requests is to add a random string named. crumb to the form. facebook also has a similar solution, in which there are usually post_form_id and fb_dtsg. Random string code implementation We follow this idea to implement a crumb. The Code is as follows: The Code is as follows: Class Crumb { Const salt = "your-secret-salt "; Static $ ttl = 7200; Static public function challenge ($ data

PHP Cross-site file upload Existing a video site A, users can upload video. b website want to call a site interface upload video, two sites are not the same server. A uploadify plugin for a website. How to achieve cross-

Multiple SQL injection and cross-site scripting vulnerabilities in PHP Address Book Release date:Updated on: Affected Systems:PHP Address BookDescription:Bugtraq id: 71862 PHP Address Book is a Web-based Address Book. PHP Address Book has multiple SQL injection and

This article introduces two methods of using php to implement page Jump and cross-site submission to forge Referer address sources. The methods mainly use fsockopen and curl functions, for more information, see. 1. URL redirection method tried The Code is as follows: Copy code Echo 'Echo 'Echo ' '; None of the above three methods ca

It is difficult to prevent the forgery of cross-site requests, and the danger is huge. attackers can use this method to prank, send spam information, and delete data. Cross-Site Request Forgery It is difficult to prevent the forgery of cross-

The php xss cross-site attack solution is probably a function searched on the Internet, but to be honest, it really doesn't fully understand the meaning of this function. First, replace all special characters in hexadecimal notation, and then replace the passed strings with letters. The last step is not too understandable. Let's take a look. Several