Risk Letters

Exploited vulnerability

CVE-2012-20003

TLP:CLEAR

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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.

Facts

  • Vendor: Web Updates KMU
  • Product: Custom Tables
  • EPSS (probability of exploitation within 30 days): 0.3 %
  • First known exploitation: 20 October 2026
  • First seen by Risk Letters: 20 October 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD