XSS in Web Updates Kmu Custom Tables
CVE-2012-20003
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/37482 (exploit)
- wpscan.com/vulnerability/211a4286-4747-4b62-acc3-fd9a57b06252 (third-party-advisory)
- www.acunetix.com/vulnerabilities/web/wordpress-plugin-custom-tables-key-paramet… (third-party-advisory)
- github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wor… (technical-description)
- wordpress.org/plugins/custom-tables/ (product)
- www.vulncheck.com/advisories/custom-tables-wordpress-plugin-3.4.6-reflected-xss… (third-party-advisory)
Frequently asked questions
- What is CVE-2012-20003?
- CVE-2012-20003 is a medium-severity vulnerability in Web Updates Kmu Custom Tables, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-20.
- How severe is CVE-2012-20003?
- Medium severity. CVSS v3 base score is 6.1 out of 10.