CVE-2026-77365: Optimole <= 4.2.10 - Unauthenticated Stored Cross-Site Scripting via 'a' (above_fold_images) Parameter
The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'a' (abovefoldimages) parameter in all versions up to, and including, 4.2.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
Which installations are affected?
All versions of the Optimole WordPress plugin up to and including 4.2.10 are affected.
Does exploitation require an account or user interaction?
No. The vulnerability can be exploited by an unauthenticated attacker without user interaction to inject stored script content.
What is the impact if exploitation succeeds?
Injected scripts execute whenever a user accesses an affected page. The issue can affect confidentiality and integrity, while no availability impact is identified in the supplied severity vector.