Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization <= 4.2.6 - Cross-Site Request Forgery via 'optml_replace_file' AJAX Action
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization | <= 4.2.6 | 4.2.7 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-352- Platform
- WordPress
- Package
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization- Disclosed
- 17.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 8a90de6e-6bd5-43b6-980d-84d25d4120ad - Wordfence Intelligence
Copyright 1999-2026 The MITRE Corporation
Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 13
- First → latest
- 03.2022 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 9
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 2
- 2025: 1
- 2026: 9
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Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization <= 4.2.6 - Cross-Site Request Forgery via 'optml_replace_file' AJAX Action this entry
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