CVE-2026-5226
Received Received - Intake
Reflected XSS in Optimole WordPress Plugin Allows Script Injection

Publication date: 2026-04-11

Last updated on: 2026-04-11

Assigner: Wordfence

Description
The Optimole – Optimize Images in Real Time plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via URL paths in versions up to, and including, 4.2.3 This is due to insufficient output escaping on user-supplied URL paths in the get_current_url() function, which are inserted into JavaScript code via str_replace() without proper JavaScript context escaping in the replace_content() function. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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Meta Information
Published
2026-04-11
Last Modified
2026-04-11
Generated
2026-06-16
AI Q&A
2026-04-11
EPSS Evaluated
2026-06-15
NVD
CVE-2026-5226
EUVD
EUVD-2026-21664
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
optimole optimize_images_in_real_time to 4.2.3 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The vulnerability exists in the Optimole – Optimize Images in Real Time plugin for WordPress, specifically in versions up to and including 4.2.3. It is a Reflected Cross-Site Scripting (XSS) issue caused by insufficient output escaping of user-supplied URL paths. These URL paths are processed in the get_current_url() function and inserted into JavaScript code via str_replace() without proper escaping for JavaScript context in the replace_content() function. This allows unauthenticated attackers to inject arbitrary web scripts that execute if a user is tricked into clicking a malicious link.

Impact Analysis

This vulnerability can allow attackers to execute arbitrary JavaScript in the context of the affected website. This can lead to actions such as stealing user session cookies, redirecting users to malicious sites, or performing actions on behalf of the user without their consent. Since the attack requires tricking a user into clicking a crafted link, it can be used for phishing or other social engineering attacks.

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