Christiaan Conover

Featured Image Caption makes it simple to show a caption with the featured image of a post or page. It works seamlessly with most themes, with no coding required. If you like to mess about in the code, it supports that too.

Featured Image Caption

Easily add and display a caption for the featured image of a post.

Terry Chay

The core <a href="https://developer.wordpress.org/reference/functions/img_caption_shortcode/#source-code" rel="nofollow ugc"><code>img_caption_shortcode()</code></a> function <a href="https://core.trac.wordpress.org/ticket/24990#comment:13" rel="nofollow ugc">doesn’t process shortcodes when they’re in the caption (just when they’re in the image)</a>. This simple plugin changes it so that captions can contain shortcodes.
It also fixes some other small edge-case bugs in the original code.

Nested image caption shortcode

Allows caption shortcode to have shortcodes

Featured Image Caption vs Nested image caption shortcode