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TI-2012-05490 Aliases CVE-2012-20003GHSA-wvm8-6956-c3j5

Reflected cross-site scripting in Custom Tables WordPress plugin

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Custom Tables plugin for WordPress before 3.4.6, from Web Updates KMU, contains a reflected cross-site scripting flaw (CWE-79). The iframe.php file does not sanitize the key parameter, so injected scripts run in the victim's browser. An unauthenticated attacker can send a crafted GET request that makes a victim's browser run script and steal cookies. The Shadowserver Foundation first observed exploitation on 2023-10-20, and a public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Custom Tables (Web Updates KMU): 3.4.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Web Updates KMUCustom Tablesbefore 3.4.63.4.6Patch availableCNA
  • Custom Tables VendorWeb Updates KMU Affected before 3.4.6 Fixed in 3.4.6 Patch available CNA

Remediation

Update Custom Tables to version 3.4.6.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Custom Tables (Web Updates KMU) Fixed in 3.4.6

Timeline

  1. 2026-10-20 Threatist record created from CVE-2012-20003
  2. 2026-10-21 Alias added: GHSA-wvm8-6956-c3j5
  3. 2026-10-23 CISA SSVC decision points changed
  4. 2026-10-23 Priority changed: LOW → MEDIUM

References

Exploit 1

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences