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5.1

Custom Tables plugin lets attackers run scripts in browsers

CVE-2012-20003 · published 15 days ago
Summary

The Custom Tables add‑on for WordPress (versions before 3.4.6) accepts a value in its iframe.php page without cleaning it. An attacker can send a specially crafted link that makes a visitor’s browser execute malicious code, potentially stealing login information. Update the plugin to version 3.4.6 or later, or remove it if not needed, to stop this risk.

What to do
  • Update web updates kmu custom tables to version 3.4.6 or later.
Affected software
VendorProductAffected versions
web updates kmu custom tables < 3.4.6
Original advisory text
Custom Tables WordPress Plugin < 3.4.6 Reflected XSS via iframe.php
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.1 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published20 Oct 2026
Updated4 Nov 2026
First seen20 Oct 2026
Sources
CVE-2012-20003 · NVD
CVE-2012-20003 · MITRE
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