What is CVE-2026-1356?

CVE-2026-1356 is a medium-severity vulnerability in Mateuszgbiorczyk Converter For Media – Optimize Images | Convert Webp & Avif, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.8/10. Published 2026-02-12.

How severe is CVE-2026-1356?

Medium severity. CVSS v3 base score is 4.8 out of 10.

SSRF in Mateuszgbiorczyk Converter For Media – Optimize Images | Convert Webp & Avif

CVE-2026-1356

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…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.002 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: 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 — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

Frequently asked questions

What is CVE-2026-1356?: CVE-2026-1356 is a medium-severity vulnerability in Mateuszgbiorczyk Converter For Media – Optimize Images | Convert Webp & Avif, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.8/10. Published 2026-02-12.
How severe is CVE-2026-1356?: Medium severity. CVSS v3 base score is 4.8 out of 10.