CVE-2021-25074: WebP Converter for Media < 4.0.3 - Unauthenticated Open redirect

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-24 · updated 2026-06-17
Weakness: CWE-601

Description

The WebP Converter for Media WordPress plugin before 4.0.3 contains a file (passthru.php) which does not validate the src parameter before redirecting the user to it, leading to an Open Redirect issue

Affected products

WebP Converter for Media – Convert WebP and AVIF & Optimize Images: before 4.0.3 — fixed in 4.0.3

How to fix

Upgrade to a fixed version: WebP Converter for Media – Convert WebP and AVIF & Optimize Images 4.0.3. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/f3c0a155-9563-4533-97d4-03b9bac83164
https://wpscan.com/vulnerability/f3c0a155-9563-4533-97d4-03b9bac83164

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