Attack Chain

1. An unauthenticated attacker crafts a malicious HTTP request targeting the WordPress site.
2. The request includes a payload containing a JavaScript injection within the csvdata[0][cost_of_goods_value] parameter.
3. The attacker sends the crafted POST request to a WordPress endpoint that processes the Cost of Goods plugin data.
4. The Cost of Goods plugin fails to properly sanitize or escape the injected JavaScript within the csvdata[0][cost_of_goods_value] parameter.
5. The malicious payload is stored in the WordPress database.
6. A user visits a page that displays the stored data from the Cost of Goods plugin.
7. The injected JavaScript code is executed within the user’s browser, potentially performing actions such as stealing cookies or redirecting the user to a malicious website.

Impact

Successful exploitation of this stored XSS vulnerability could allow an attacker to compromise WordPress administrator accounts, inject malicious content into the website, or redirect users to phishing sites. As an unauthenticated user can inject arbitrary scripts, the impact could be widespread if an administrator views the injected content. Compromise of the administrator account could lead to complete control over the WordPress website.

Recommendation

• Upgrade the Cost of Goods by PixelYourSite plugin to a version greater than 1.2.12 to patch CVE-2026-7613.
• Deploy the Sigma rule Detect CVE-2026-7613 Exploitation — Cost of Goods Plugin XSS to identify potential exploitation attempts in web server logs.
• Implement input validation and output encoding on all user-supplied data to prevent XSS vulnerabilities.
• Monitor WordPress logs for suspicious activity related to the Cost of Goods plugin, such as unexpected modifications to plugin settings or data.