CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The Github Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'repo' shortcode attribute in the 'github' shortcode in all versions up to, and including, 0.1 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
Github Shortcode versions 0.1 and earlier contain a cross-site scripting (XSS) vulnerability in shortcode processing. An attacker with low-level site access can inject malicious scripts that execute in other users' browsers when they view pages containing the shortcode. The vulnerability affects the entire site scope due to how the shortcode is rendered.
What an attacker can do
Inject malicious JavaScript that runs in other users' browsers when they view affected pages.
Potential impact on your site
Attackers with contributor access can steal admin session tokens, modify site content, or redirect users to malicious sites.
Conditions required to exploit
Attacker needs low-level site access (e.g., contributor or author role) to insert or modify shortcodes.
Key dates
External resources
