"Nulled", "cracked" or "GPL-free" copies of premium plugins are widely advertised as a way to avoid paying for software. They are the most common single cause of hacked sites we clean.
What is actually in them
The licence check is removed by modifying the code — and in the great majority of cases, other code is added at the same time. Typical payloads include hidden administrator accounts created on activation, backdoors in obfuscated PHP that survive plugin removal, spam links injected only for search-engine visitors, and redirect scripts that send mobile visitors to third-party sites.
Why it is hard to detect
The malicious code often stays dormant for weeks, and it frequently reinstalls itself from a second file elsewhere in the site after you delete the plugin.
What it costs you
Beyond the cleanup: blacklisting by Google, suspension of the hosting account if it is used to send spam, lost customer trust, and no security updates at all — nulled copies never update, so every vulnerability discovered afterwards stays open.
Legitimate alternatives
- The free wordpress.org directory covers most needs well.
- Many premium plugins have capable free versions.
- Buy a single-site licence directly from the developer — usually far cheaper than one cleanup.
Accounts found distributing malware from nulled software may be suspended under our acceptable use policy.
