# CVE-2023-51414: WordPress EnvíaloSimple Plugin <= 2.1 is vulnerable to PHP Object Injection

> An attacker can exploit PHP object injection in the EnvíaloSimple WordPress plugin to potentially execute arbitrary code.

- **Severity:** Critical 9.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **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:** 29 Dec 2023
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-6p7c-wj96-hf8h

## What is CVE-2023-51414?

CVE-2023-51414 is a critical unsafe deserialization vulnerability in EnvialoSimple EnvíaloSimple: Email Marketing y Newsletters, published on 29 Dec 2023. 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

Deserialization of Untrusted Data vulnerability in EnvialoSimple EnvíaloSimple: Email Marketing y Newsletters.This issue affects EnvíaloSimple: Email Marketing y Newsletters: from n/a through 2.1.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2023-51414?

It affects 1 product.


Products: Donweb Envialosimple\.

## How do I fix CVE-2023-51414?

No fix has been published for CVE-2023-51414 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-51414 being exploited?

There is no known exploitation of CVE-2023-51414 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-51414 and fix it if it is affected.

What it is: CVE-2023-51414 is a critical unsafe deserialization vulnerability in EnvialoSimple EnvíaloSimple: Email Marketing y Newsletters, published on 29 Dec 2023. 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-2023-51414 in the wild and no public exploit code.

Affected product: EnvialoSimple EnvíaloSimple: Email Marketing y Newsletters. 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-2023-51414/ (Markdown: https://insights.sbomify.com/CVE-2023-51414/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-51414
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-51414
- OSV: https://osv.dev/vulnerability/CVE-2023-51414

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-51414/
Summaries are generated and may contain mistakes; the official description above is the record.