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 Ultra Skype Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'btn_id' parameter of the [ultra_skype] shortcode in all versions up to, and including, 1.0 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
Ultra Skype Button versions 1.0 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users on the site. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself. No user interaction is required from the victim to trigger the attack.
What an attacker can do
Inject malicious scripts that execute in other users' browsers and affect site functionality.
Potential impact on your site
Authenticated users can inject scripts that compromise other users' sessions, steal data, or deface site content.
Conditions required to exploit
Attacker must have a low-privilege account (e.g., subscriber or contributor role) on the site.
Key dates
External resources
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