CVE-2012-20003 Custom Tables WordPress Plugin < 3.4.6 Reflected XSS via iframe.php

Q: What is CVE-2012-20003?

CVE-2012-20003 is a medium-severity vulnerability in Web Updates KMU Custom Tables, published on 20 Oct 2026.

Q: Is CVE-2012-20003 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-20003 exists.

Q: How do I fix CVE-2012-20003?

No fix has been published for CVE-2012-20003 yet. Limit exposure of the affected software until one is available.

Medium 5.1 Published 20 Oct 2026 Updated 23 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2012-20003?

CVE-2012-20003 is a medium-severity vulnerability in Web Updates KMU Custom Tables, published on 20 Oct 2026.

Official description

Custom Tables plugin for WordPress before 3.4.6 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the unsanitized 'key' parameter in iframe.php. Attackers can craft GET requests to /wp-content/plugins/custom-tables/iframe.php with s=1 and a malicious key value to execute script in victims' browsers and steal cookies. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-20.

Weakness: CWE-79

Which versions are affected by CVE-2012-20003?

How do I fix CVE-2012-20003?

No fix has been published for CVE-2012-20003 yet. Limit exposure of the affected software until one is available.

Is CVE-2012-20003 being exploited?