CVE-2026-84829
Low risk· EPSS 13%Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
The Optimole WordPress plugin before 4.2.12 does not properly escape a user supplied value before using it to build an image tag attribute. This allows unauthenticated users to inject arbitrary attributes into pages served to every visitor, which leads to Stored Cross-Site Scripting.
Risk Assessment
The organization is exposed to persistent script injection that could steal user data, hijack sessions, or spread malware to all website visitors.
Recommendation
It is recommended to immediately update the Optimole plugin to version 4.2.12 or later, which fixes escaping of image attribute values.
Other vulnerabilities in Optimole
See all- CVE-2026-77365High
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.
- CVE-2026-57673High
The Optimole plugin version 4.2.7 and earlier contains an unauthenticated Cross Site Scripting (XSS) vulnerability. It allows a remote attacker to inject malicious script without requiring authentication.
Original NVD description (English source)
The Optimole WordPress plugin before 4.2.12 does not properly escape a user supplied value before using it to build an image tag attribute, allowing unauthenticated users to inject arbitrary attributes into pages served to every visitor, which leads to Stored Cross-Site Scripting.