Converter for Media – Optimize images | Convert WebP & AVIF <= 6.5.1 - Unauthenticated Server-Side Request Forgery via src
| CVE | CVE-2026-1356 |
|---|---|
| CVSS | 4.8 (Medium) |
| Publicly Published | February 11, 2026 |
| Last Updated | February 12, 2026 |
| Researcher |
Lucas Montes (NiRoX)
|
Description
The Converter for Media – Optimize images | Convert WebP & AVIF plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 6.5.1 via the PassthruLoader::load_image_source function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
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Vulnerability Details for Converter for Media – Optimize images | Convert WebP & AVIF
| Software Type | Plugin |
|---|---|
| Software Slug | webp-converter-for-media (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 6.5.2, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Converter for Media – Optimize images | Convert WebP & AVIF
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Converter for Media <= 6.3.2 - Missing Authorization to Authenticated (Subscriber+) Optimized Image Deletion via regenerate-attachment REST Endpoint | CVE-2025-13750 | Marcin Dudek (dudekmar) | December 16, 2025 | |
| 2 | WebP Converter for Media <= 4.0.2 - Unauthenticated Open Redirect | CVE-2021-25074 | Krzysztof Zając | December 27, 2021 | |
| 3 | WebP Converter for Media – Convert WebP and AVIF & Optimize Images <= 1.0.2 - Cross-Site Request Forgery | CVE-2019-15834 | June 27, 2019 |
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