CVE-2026-15446
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
The EWWW Image Optimizer plugin for WordPress up to version 8.7.3 is vulnerable to Stored Cross-Site Scripting via the 'data-script' attribute in post content due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access and above can inject arbitrary web scripts that execute when a user accesses an injected page.
Risk Assessment
The risk includes malicious script execution in users' browsers, which can lead to data theft, session hijacking, or further attacks.
Recommendation
Update the EWWW Image Optimizer plugin to the latest version that includes the fix. Restrict user permissions to contributor level only for trusted individuals.
Original NVD description (English source)
The EWWW Image Optimizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'data-script' Lazy Load Attribute in Post Content in all versions up to, and including, 8.7.3 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. The exploit is achieved by embedding a crafted img element with class='lazyload' and a data-script attribute pointing to an attacker-controlled URL in post content, which the plugin's bundled lazysizes ls.unveilhooks addon then uses to dynamically create and insert a script element into the DOM at page view time.