The Easy Google Fonts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the control_selectors meta field in all versions up to, and including, 2.0.4. This is due to the plugin registering the control_selectors meta field with show_in_rest enabled but without a sanitize_callback, and subsequently outputting this unsanitized data directly into <style> tags on the frontend without proper escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 11
https://plugins.trac.wordpress.org/browser/easy-google-fonts/tags/2.0.4/src/inc…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/tags/2.0.4/src/inc…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/tags/2.0.4/src/inc…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/tags/2.0.4/src/inc…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/tags/2.0.4/src/inc…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/trunk/src/includes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/trunk/src/includes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/trunk/src/includes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/trunk/src/includes…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/easy-google-fonts/trunk/src/includes…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/7bf1d5a8-84b7-40e3-b2…
security@wordfence.com