# CVE-2023-6812: WP Compress – Image Optimizer [All-In-One] <= 6.20.01 - Open Redirect via css

> Unauthenticated attackers can redirect users to malicious sites via the css parameter in WP Compress plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:** 14 May 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-4mwh-2xx5-5vp9

## What is CVE-2023-6812?

CVE-2023-6812 is a medium-severity vulnerability in aresit WP Compress – Instant Performance & Speed Optimization, published on 14 May 2024. 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 WP Compress – Image Optimizer [All-In-One plugin for WordPress is vulnerable to Open Redirect in all versions up to, and including, 6.20.01. This is due to insufficient validation on the redirect url supplied via the 'css' parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if they can successfully trick them into performing an action.

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

## Which versions are affected by CVE-2023-6812?

It affects 1 product.


Products: Wpcompress Wp Compress.

## How do I fix CVE-2023-6812?

No fix has been published for CVE-2023-6812 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6812 being exploited?

There is no known exploitation of CVE-2023-6812 in the wild and no public exploit code.

## Other vulnerabilities in aresit WP Compress – Instant Performance & Speed Optimization

- [CVE-2023-6699](https://insights.sbomify.com/CVE-2023-6699/): WP Compress – Image Optimizer [All-In-One] <= 6.10.33 - Unauthenticated Directory Traversal via css (critical 9.1)
- [CVE-2025-2110](https://insights.sbomify.com/CVE-2025-2110/): WP Compress <= 6.30.15 - Authenticated (Subscriber+) Missing Authorization via Multiple Functions (high 8.8)
- [CVE-2024-1934](https://insights.sbomify.com/CVE-2024-1934/): WP Compress – Image Optimizer <= 6.11.08 - Missing Authorization to Unauthenticated CDN Modification (high 7.5)
- [CVE-2025-47546](https://insights.sbomify.com/CVE-2025-47546/): WordPress WP Compress plugin <= 6.30.30 - Cross Site Request Forgery (CSRF) Vulnerability (high 7.1)
- [CVE-2024-47384](https://insights.sbomify.com/CVE-2024-47384/): WordPress WP Compress plugin <= 6.20.13 - Reflected Cross Site Scripting (XSS) vulnerability (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6812 and fix it if it is affected.

What it is: CVE-2023-6812 is a medium-severity vulnerability in aresit WP Compress – Instant Performance & Speed Optimization, published on 14 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-6812 in the wild and no public exploit code.

Affected product: aresit WP Compress – Instant Performance & Speed Optimization. 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-2023-6812/ (Markdown: https://insights.sbomify.com/CVE-2023-6812/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6812
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6812
- OSV: https://osv.dev/vulnerability/CVE-2023-6812

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-6812/
Summaries are generated and may contain mistakes; the official description above is the record.