WordPress security changelog
MEDIUM CVE-2026-1356 Deferred

Converter for Media – Optimize images | Convert WebP & AVIF: Server-side request forgery

Converter for Media – Optimize images | Convert WebP & AVIF is affected by server-side request forgery. The vulnerable path is reachable without authentication. The vulnerable server can be induced to make attacker-selected network requests.

CVE / CNA score 4.8 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Converter for Media – Optimize images | Convert WebP & AVIF
Plugin slug
converter-for-media-optimize-images-convert-webp-avif
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Feb 12, 2026
Weakness
CWE-918 — Server-Side Request Forgery (SSRF)

This CVE was published Feb 12, 2026 and is one of 2 known issues for this plugin.

Update, patch or deactivate.

Update Converter for Media – Optimize images | Convert WebP & AVIF to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Primary and upstream sources