CVE-2026-1356
Converter for Media – Optimize images | Convert WebP & AVIF <= 6.5.1 - Unauthenticated Server-Side Request Forgery via src
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | mateuszgbiorczyk |
| Product | converter for media – optimize images | convert webp & avif |
| Published | Feb 12, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
mateuszgbiorczyk / Converter for Media – Optimize images | Convert WebP & AVIF
0 ≤ 6.5.1
References
Credits
Lucas Montes