CVE-2026-1356

Converter for Media – Optimize images | Convert WebP & AVIF <= 6.5.1 - Unauthenticated Server-Side Request Forgery via src

CVSS 4.8 MEDIUMEPSS 0.2%CWE-918

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

12 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

mateuszgbiorczyk · Converter for Media – Optimize images | Convert WebP & AVIF

References

https://plugins.trac.wordpress.org/changeset/3445904/webp-converter-for-media https://www.wordfence.com/threat-intel/vulnerabilities/id/188d812c-2955-4b0c-ae1c-b42c0f60b73b?source=cve