# CVE-2023-6266: Backup Migration <= 1.3.6 - Unauthenticated Arbitrary Backup Download to Sensitive Information Exposure

> Unauthenticated attackers can download backup files containing sensitive data due to insufficient path validation in the Backup Migration plugin.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jan 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-wqc2-2gpx-6j9r

## What is CVE-2023-6266?

CVE-2023-6266 is a high-severity path traversal vulnerability in inisev BackupBliss – Backup & Migration with Free Cloud Storage, published on 11 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Backup Migration plugin for WordPress is vulnerable to unauthorized access of data due to insufficient path and file validation on the BMI_BACKUP case of the handle_downloading function in all versions up to, and including, 1.3.6. This makes it possible for unauthenticated attackers to download back-up files which can contain sensitive information such as user passwords, PII,  database credentials, and much more.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2023-6266?

It affects 1 product.


Products: Backupbliss Backup Migration.

## How do I fix CVE-2023-6266?

No fix has been published for CVE-2023-6266 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6266 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6266 exists.

Public exploit code:

- WordPress Backup Migration <= 1.3.6 - Path Traversal (nuclei): http/cves/2023/CVE-2023-6266.yaml

## Other vulnerabilities in inisev BackupBliss – Backup & Migration with Free Cloud Storage

- [CVE-2023-6972](https://insights.sbomify.com/CVE-2023-6972/): Backup Migration <= 1.3.9 - Unauthenticated Path Traversal to Arbitrary File Deletion (critical 9.8)
- [CVE-2023-6553](https://insights.sbomify.com/CVE-2023-6553/): Backup Migration <= 1.3.7 - Unauthenticated Remote Code Execution (critical 9.8)
- [CVE-2023-6971](https://insights.sbomify.com/CVE-2023-6971/): Code injection in Backup Migration (high 8.1)
- [CVE-2023-6271](https://insights.sbomify.com/CVE-2023-6271/): Backup Migration Staging < 1.3.6 - Sensitive Data Exposure (high 7.5)
- [CVE-2023-7002](https://insights.sbomify.com/CVE-2023-7002/): Backup Migration <= 1.3.9 - Authenticated (Admin+) OS Command Injection via url (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6266 and fix it if it is affected.

What it is: CVE-2023-6266 is a high-severity path traversal vulnerability in inisev BackupBliss – Backup & Migration with Free Cloud Storage, published on 11 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6266 exists.

Affected product: inisev BackupBliss – Backup & Migration with Free Cloud Storage. 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-2023-6266/ (Markdown: https://insights.sbomify.com/CVE-2023-6266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6266
- OSV: https://osv.dev/vulnerability/CVE-2023-6266

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-6266/
Summaries are generated and may contain mistakes; the official description above is the record.