CVE-2026-77365 Optimole <= 4.2.10 - Unauthenticated Stored Cross-Site Scripting via 'a' (above_fold_images) Parameter
Unauthenticated attackers can inject arbitrary web scripts via the above_fold_images parameter, leading to stored XSS execution on user pages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77365?
CVE-2026-77365 is a high-severity cross-site scripting vulnerability in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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' (above_fold_images) 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-77365?
How do I fix CVE-2026-77365?
No fix has been published for CVE-2026-77365 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-77365 being exploited?
There is no known exploitation of CVE-2026-77365 in the wild and no public exploit code.
Sources
Also known as GHSA-r4gc-q6fw-m869.