CVE-2026-120677
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
The Optimole plugin for WordPress (up to 4.2.18) is vulnerable to stored cross-site scripting via the `comment` parameter due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a user visits an injected page. Exploitation requires the comment to be approved by an administrator and the affected post to contain at least one iframe or video element (e.g., a core Video block), which is sufficient under default plugin settings where video lazy loading is enabled.
Risk Assessment
Possible execution of malicious script in a user's browser, potentially leading to session or data theft. However, it requires administrator interaction (comment approval).
Recommendation
Update the Optimole plugin to a version later than 4.2.18. Additionally, consider disabling video lazy loading if not needed, and review comments before approval.
Other vulnerabilities in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization
See all- CVE-2026-120739High
The Optimole plugin for WordPress (up to 4.2.18) is vulnerable to stored cross-site scripting via the `missing_srcsets[*][*].s` parameter due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a user visits an injected page. The HMAC signature required for REST endpoint authorization is published in plaintext inside the `optimoleDataOptimizer` JavaScript object on pages with an incomplete profile, effectively removing the authentication barrier.
- CVE-2026-11784Medium
The Optimole plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) in versions up to 4.2.6. The issue arises from missing or incorrect nonce validation in the replace_file function, allowing unauthenticated attackers to overwrite existing media attachments.
Original NVD description (English source)
The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.2.18 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. Exploitation requires the comment to be approved by an administrator and for the affected post to contain at least one iframe or video element (e.g., a core Video block), which is sufficient under default plugin settings where video lazy loading is enabled.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS