Reported vulnerability

Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization <= 4.2.6 - Cross-Site Request Forgery via 'optml_replace_file' AJAX Action

Q: Which versions of Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.2.6. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization?

Wordfence reports a fix for this issue in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization. It lists these fixed versions: 4.2.7. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 17 Jun 2026

Updated 18 Jun 2026

CVE-2026-11784

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 4.3

The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.2.6. This is due to missing or incorrect nonce validation on the replace_file function. This makes it possible for unauthenticated attackers to overwrite existing media attachments with attacker-supplied file content by supplying a forged multipart POST request targeting any attachment the victim has edit_post capability over via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. The forged request requires a victim with at least Author-level privileges, as the handler enforces a current_user_can('edit_post', $id) check; tricking an Author-level or higher user into clicking a crafted link is sufficient to trigger the overwrite against attachments that user can edit.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization

Software: plugin · optimole-wp
Affected versions: Start version unspecified, through 4.2.6
Fix availability: Fix available
Fixed versions: 4.2.7

Recommended action

Update to version 4.2.7, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/8a90de6e-6bd5-43b6-980d-84d25d4120ad?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.2.6. Use the version checker above to compare your installed release with this report.

Is a fix available for Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization?

Wordfence reports a fix for this issue in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization. It lists these fixed versions: 4.2.7. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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