How severe is CVE-2026-77365?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Optimole – Optimize Images | Convert Webp & Avif Cdn Lazy Load Image Optimization

CVE-2026-77365

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Optimole – Optimize Images | Convert Webp & Avif Cdn Lazy Load Image Optimization

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-77365?: CVE-2026-77365 is a high-severity vulnerability in Optimole – Optimize Images | Convert Webp & Avif Cdn Lazy Load Image Optimization, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-08-28.
How severe is CVE-2026-77365?: High severity. CVSS v3 base score is 7.2 out of 10.