Custom URL Tracking Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().
Conclusion & alert: CVE-2015-9366 is rated Moderate Risk (40.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.44%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-30 | 12.01% | 0.44% | -11.57% |
| 2 | 2025-03-29 | 0.44% | 12.01% | +11.57% |
| 3 | 2025-03-24 | — | 0.44% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.0 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ithemes | custom_url_tracking | < 1.1.0 | cpe:2.3:a:ithemes:custom_url_tracking:*:*:*:*:*:wordpress:*:* |
| URL | Tags |
|---|---|
| https://blog.sucuri.net/2015/04/security-advisory-xss-vulnerability-affecting-multiple-wordpress-plugins.html | Third Party Advisory |
| https://ithemes.com/coordinated-wordpress-plugin-security-update/ | Patch Vendor Advisory |