CVE-2025-15678
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
The Nexter Blocks WordPress plugin before version 5.0.2 does not sanitize uploaded SVG files and allows SVG uploads for any user able to upload files (Author by default). This allows them to upload a file containing malicious JavaScript that executes when the file is accessed, leading to Stored Cross-Site Scripting.
Risk Assessment
An attacker can execute scripts in the context of the website, potentially leading to data theft, session hijacking, or malware distribution.
Recommendation
Update the Nexter Blocks plugin to version 5.0.2 or later, which includes the fix.
Other vulnerabilities in Nexter Blocks
See all- CVE-2026-15420Medium
The Nexter Blocks plugin for WordPress up to version 5.0.0 has a directory traversal vulnerability via the 'plus_name' parameter. Authenticated attackers with subscriber-level access or higher can delete arbitrary JS/CSS files on the server.
- CVE-2026-6740Medium
The Nexter Blocks plugin for WordPress up to version 4.7.4 is vulnerable to Stored Cross-Site Scripting via the 'commentIcon' parameter due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary scripts that execute when a user visits an affected page.
- CVE-2026-39516Medium
The Nexter Blocks WordPress plugin exposes sensitive system information to unauthorized entities. The vulnerability allows retrieval of embedded sensitive data.
Original NVD description (English source)
The Nexter Blocks WordPress plugin before 5.0.2 does not sanitize uploaded SVG files and allows SVG uploads for any user able to upload files (Author by default), allowing them to upload a file containing malicious JavaScript that executes when the file is accessed, leading to Stored Cross-Site Scripting.