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

> An unauthenticated attacker can redirect users to malicious sites via an unvalidated parameter in the WebP Converter for Media WordPress plugin.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4wcp-h664-5xc6

## What is CVE-2021-25074?

CVE-2021-25074 is a medium-severity vulnerability in Unknown WebP Converter for Media – Convert WebP and AVIF & Optimize Images, published on 24 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2021-25074?

It affects 1 product.


Products: Webp Converter for Media Project Webp Converter for Media.

## How do I fix CVE-2021-25074?

No fix has been published for CVE-2021-25074 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25074 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25074 exists.

Public exploit code:

- WordPress WebP Converter for Media < 4.0.3 - Unauthenticated Open Redirect (nuclei): http/cves/2021/CVE-2021-25074.yaml

## Other vulnerabilities in Unknown WebP Converter for Media – Convert WebP and AVIF & Optimize Images

- [CVE-2019-15834](https://insights.sbomify.com/CVE-2019-15834/): Cross-site request forgery in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25074 and fix it if it is affected.

What it is: CVE-2021-25074 is a medium-severity vulnerability in Unknown WebP Converter for Media – Convert WebP and AVIF & Optimize Images, published on 24 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25074 exists.

Affected product: Unknown WebP Converter for Media – Convert WebP and AVIF & Optimize Images. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-25074/ (Markdown: https://insights.sbomify.com/CVE-2021-25074/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25074
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25074
- OSV: https://osv.dev/vulnerability/CVE-2021-25074

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25074/
Summaries are generated and may contain mistakes; the official description above is the record.