CVE-2026-15726
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
The Serious Slider plugin for WordPress up to version 1.4.0 is vulnerable to Stored Cross-Site Scripting via the 'theme' shortcode attribute. Insufficient input sanitization and output escaping allow authenticated attackers with contributor-level access to inject arbitrary web scripts that execute when a user accesses an injected page.
Risk Assessment
The organization may face session theft, phishing, or other client-side attacks. Injected pages can undermine user trust.
Recommendation
Update the Serious Slider plugin to the latest version. Restrict account privileges and regularly scan content for malicious code.
Original NVD description (English source)
The Serious Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'theme' Shortcode Attribute in all versions up to, and including, 1.4.0 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.