CVE-2025-13907 MEDIUM

CVE-2025-13907: CSS3 Buttons <= 0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Vendor Tunilame
Product CSS3 Buttons
Weakness CWE-79 · XSS
Published December 6, 2025
Last update April 8, 2026

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

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

01Description

The CSS3 Buttons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'button' shortcode in all versions up to, and including, 0.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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

02Summary

CSS3 Buttons contains a cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject malicious scripts affecting other users. The vulnerability exists in versions 0.1 and earlier. An attacker with low-level privileges can inject code that executes in other users' browsers, potentially compromising their sessions or stealing data.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in other users' browsers and affects the site.

Potential impact on your site

04Site Impact

Authenticated users' sessions and data may be compromised; site reputation and user trust at risk.

Conditions required to exploit

05Prerequisites

Attacker must have low-level user account access; no user interaction required.

Key dates

06Disclosure timeline

December 6, 2025 CVE published
April 8, 2026 Record updated