WordPress · infra · fg-0095

Tags installed with Simple Custom CSS and JS vanish after WordPress auto-updates to 7.1

Page source shows an empty 'start Simple Custom CSS and JS' comment block

Verified 2026-10-12 · Confirmed by 0 builders · Trust 50/100

Cause

In WordPress 7.1, get_post() returns null for a non-numeric argument. Plugin version 3.53 calls get_post() with a string such as '123.html', so HTML items print nothing. Re-saving the item does not help.

Fix

Update the plugin to 3.54 or later, then clear page caches and confirm the tag loads.

Apply

wp plugin update custom-css-js && curl -s -A "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36" "https://example.com/?cb=$(date +%s)" | grep -c gtm.js

Affects: Simple Custom CSS and JS 3.53 on WordPress 7.1.x, fixed in 3.54, October 2026

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