Problem/Motivation
Since #2441811 landed, it seems that any text format that allows <iframe> or <textarea> within the html filter can lead to data loss.
Steps to reproduce
Configure a text format to allow:<em> <strong> <cite> <blockquote cite> <code> <li> <dl> <dt> <dd> <h4 id class> <h5 id class> <br> <img src alt width height class> <table class> <caption class> <tbody> <thead> <tfoot> <th> <td> <tr> <iframe title src> <div class> <p class> <h2 id class> <h3 id class> <span id class> <a rel accesskey target title name id href hreflang class data-cta-track-sync data-cta-track-async data-cta-description data-cta-placement> <ul type class> <ol start type class> <hr>
Add some content with an <a> tag.
Notice that the <a> will not be rendered on the front-end, and is not persisted into the database.
I'm filing this as critical because existing content being re-saved can lead to data loss.
Proposed resolution
TBD
Remaining tasks
TBD
User interface changes
TBD
API changes
TBD
Data model changes
TBD
Release notes snippet
TBD