2023年8月3日 · Many frameworks help handle XSS in various ways. When rolling your own or if there's some XSS concern, we can leverage filter_input_array (available in PHP 5 >= 5.2.0, PHP 7.) I typically will add this snippet to my SessionController, because all calls go through there before any other controller interacts with the data.

2020年9月23日 · My client is being told he is open to a Cross Site Scripting (XSS) vulnerability. My research shows that an iFrame can then be used to steal cookies and do malicious things. The recommended solution is to use the PHP Function htmlspecialchars() which changes characters to "HTML entities".

There are a number of ways hackers put to use for XSS attacks, PHP's built-in functions do not respond to all sorts of XSS attacks. Hence, functions such as strip_tags, filter_var, mysql_real_escape_string, htmlentities, htmlspecialchars, etc do not protect us 100%. You need a better mechanism, here is what is solution:

2011年5月21日 · I am studying this issue about the PHP_SELF variable and the XSS attack. There is something that I still can't understand: PHP_SELF variable is suposed to reference the name of the script file (the script that is running). Then, why does it take its value from the URL? (allowing the XSS problem).

2012年2月22日 · Possible Duplicate: What are the best practices for avoiding xss attacks in a PHP site Examples of XSS that I can use to test my page input? What are examples/types of client side xss attack...

2010年6月25日 · Where XSS becomes a problem is when people a) use it to bypass client-side validation or input filtering or b) when people use it to manipulate input fields (for example, changing the values of OPTION tags in an ACL to grant them permissions they shouldn't have).

2011年7月13日 · Within html comments, no protection is offered by encoding. The key to writing code that is not vulnerable to XSS attacks is understanding all the different attack vectors. For the complete details on XSS prevention, I recommend the OWASP XSS cheatsheet.

2012年12月21日 · The bad news. Unfortunately, preventing XSS in PHP is a non-trivial undertaking. Unlike SQL injection, which you can mitigate with prepared statements and carefully selected white-lists, there is no provably secure way to separate the information you are trying to pass to your HTML document from the rest of the document structure.

2017年7月7日 · I was reading a report on hackerone.com and someone submitted an XSS bug, which uses Wordpress stream function, to Uber. First he displayed a simple alert box, but later he displayed custom php code, phpinfo();, which gets executed. Question. I can not comprehend how someone could use XSS to execute php, I thought that was impossible.

2011年3月17日 · XSS is an output problem and not an input problem, which is why something like xss_clean() can never be a reliable approach to solving XSS problems (and xss_clean() itself is a laughably terrible implementation even by the low, low standards of anti-XSS tools). I'm very surprised you appear to be endorsing it as a preferable alternative to ...