# CVE-2026-4030: Database Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Arbitrary File Read and Deletion

> Unauthenticated attackers can read and delete arbitrary files in WordPress Multisite environments using the Database Backup plugin.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 May 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-v7cf-3qh3-fc52

## What is CVE-2026-4030?

CVE-2026-4030 is a high-severity missing authorization vulnerability in wpengine Database Backup for WordPress, published on 14 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Database Backup for WordPress plugin for WordPress is vulnerable to unauthorized arbitrary file read and deletion in all versions up to, and including, 2.5.2. This is due to the plugin not properly enforcing the return value of its authorization check combined with a user-controlled backup directory parameter. This makes it possible for unauthenticated attackers to read and delete arbitrary files on the server, leading to Sensitive Information Exposure and potential site takeover. Note: This vulnerability is only exploitable in WordPress Multisite environments where the deprecated is_site_admin() function exists.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-4030?


## How do I fix CVE-2026-4030?

No fix has been published for CVE-2026-4030 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4030 being exploited?

There is no known exploitation of CVE-2026-4030 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4030 and fix it if it is affected.

What it is: CVE-2026-4030 is a high-severity missing authorization vulnerability in wpengine Database Backup for WordPress, published on 14 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-4030 in the wild and no public exploit code.

Affected product: wpengine Database Backup for WordPress. 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-2026-4030/ (Markdown: https://insights.sbomify.com/CVE-2026-4030/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4030
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4030
- OSV: https://osv.dev/vulnerability/CVE-2026-4030

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4030/
Summaries are generated and may contain mistakes; the official description above is the record.