# CVE-2024-2721: WordPress Social Media Share Buttons plugin <= 2.1.0 - PHP Object Injection vulnerability

> An attacker can exploit PHP object injection in the Social Media Share Buttons plugin to potentially execute arbitrary code on the WordPress site.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2024
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-cxqp-32c8-ch8c

## What is CVE-2024-2721?

CVE-2024-2721 is a high-severity unsafe deserialization vulnerability in Social Media Share Buttons, published on 20 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Deserialization of Untrusted Data vulnerability in Social Media Share Buttons By Sygnoos Social Media Share Buttons.This issue affects Social Media Share Buttons: from n/a through 2.1.0.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2024-2721?

It affects 1 product.


Products: Sygnoos Social Media Share Buttons.

## How do I fix CVE-2024-2721?

No fix has been published for CVE-2024-2721 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-2721 being exploited?

There is no known exploitation of CVE-2024-2721 in the wild and no public exploit code.

## Other vulnerabilities in Social Media Share Buttons

- [CVE-2024-1685](https://insights.sbomify.com/CVE-2024-1685/): Social Media Share Buttons <= 2.1.0 - Authenticated (Subscriber+) PHP Object Injection (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-2721 and fix it if it is affected.

What it is: CVE-2024-2721 is a high-severity unsafe deserialization vulnerability in Social Media Share Buttons, published on 20 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-2721 in the wild and no public exploit code.

Affected product: Social Media Share Buttons. 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-2024-2721/ (Markdown: https://insights.sbomify.com/CVE-2024-2721/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2721
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2721
- OSV: https://osv.dev/vulnerability/CVE-2024-2721

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-2721/
Summaries are generated and may contain mistakes; the official description above is the record.