iFrame in Taxonomies

[Loewenherz]

After the update to 5.7.1, iFrames in taxonomies (tags) are deleted on save. Code in functions.php like remove_filter( 'term_description', 'wp_kses_data' ); doesn't work not longer.

[zodiac1978]

There is no bug here. You need to remove both filter:

remove_filter( 'term_description', 'wp_kses_data' );
remove_filter( 'pre_term_description', 'wp_filter_kses' );

Or with Yoast activated (then the post context is used):

remove_filter( 'term_description', 'wp_kses_post' );
remove_filter( 'pre_term_description', 'wp_filter_post_kses' );

Although it would be even better to use the wp_kses_allowed_html filter to just add iframe to the list of allowed HTML tags with the used attributes for YouTube (if that is your use case for example).