# CVE-2021-43408: Duplicate Post WordPress Plugin SQL Injection Vulnerability

> Authenticated users with plugin access can exploit SQL injection to read, modify, or delete database data in the Duplicate Post WordPress plugin.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Nov 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-p6r2-qh95-8h4m

## What is CVE-2021-43408?

CVE-2021-43408 is a medium-severity SQL injection vulnerability in Copy Delete Posts Duplicate Post WordPress Plugin, published on 19 Nov 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In many cases it also possible to exploit features of SQL server to execute system commands and/or access the local file system. This particular vulnerability can be exploited by any authenticated user who has been granted access to use the Duplicate Post plugin. By default, this is limited to Administrators, however the plugin presents the option to permit access to the Editor, Author, Contributor and Subscriber roles.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-43408?

It affects 1 product.


Products: Duplicate Post Project Duplicate Post.

## How do I fix CVE-2021-43408?

No fix has been published for CVE-2021-43408 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-43408 being exploited?

There is no known exploitation of CVE-2021-43408 in the wild and no public exploit code.

Public exploit code:

- https://github.com/tuannq2299/CVE-2021-43408 (github_poc): https://github.com/tuannq2299/CVE-2021-43408

## Other vulnerabilities in Copy Delete Posts Duplicate Post WordPress Plugin

- [CVE-2014-10379](https://insights.sbomify.com/CVE-2014-10379/): SQL injection in n/a (critical 9.8)
- [CVE-2014-10378](https://insights.sbomify.com/CVE-2014-10378/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-43408 and fix it if it is affected.

What it is: CVE-2021-43408 is a medium-severity SQL injection vulnerability in Copy Delete Posts Duplicate Post WordPress Plugin, published on 19 Nov 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-43408 in the wild and no public exploit code.

Affected product: Copy Delete Posts Duplicate Post WordPress Plugin. 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-2021-43408/ (Markdown: https://insights.sbomify.com/CVE-2021-43408/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-43408
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43408
- OSV: https://osv.dev/vulnerability/CVE-2021-43408

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-43408/
Summaries are generated and may contain mistakes; the official description above is the record.