The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.
https://wpscan.com/vulnerability/6dae6dca-7474-4008-9fe5-4c62b9f12d0a
https://wpdirectory.net/search/01G02RSGMFS1TPT63FS16RWEYR
https://wpdirectory.net/search/01FWPVWA7BC5DYGZHNSZQ9QMN5
https://freemius.com/blog/managing-security-issues-open-source-freemius-sdk-security-disclosure/