CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The WP SEO Structured Data Schema plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `_kcseo_ative_tab` parameter in all versions up to, and including, 2.8.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
WP SEO Structured Data Schema versions 2.8.1 and earlier contain a cross-site scripting vulnerability. An attacker with low-level site access can inject malicious scripts that execute in other users' browsers, potentially compromising their accounts or stealing sensitive data. The vulnerability requires specific conditions to exploit but can affect multiple users across the site.
What an attacker can do
Inject malicious scripts that run in other users' browsers to steal data or compromise accounts.
Potential impact on your site
Site visitors and administrators may have their sessions hijacked or credentials stolen through injected scripts.
Conditions required to exploit
Attacker needs low-level site access (e.g., subscriber or contributor account); no user interaction required.
Key dates
External resources
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