# CVE-2021-39327: BulletProof Security <= 5.1 Sensitive Information Disclosure

> Attackers can access a public log file to reveal full site and database backup paths, exposing sensitive infrastructure details.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:** 17 Sep 2021
- **Updated:** 31 Mar 2025
- **Also known as:** GHSA-6qg5-vf7x-4fm3

## What is CVE-2021-39327?

CVE-2021-39327 is a medium-severity vulnerability in AITpro BulletProof Security, published on 17 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The BulletProof Security WordPress plugin is vulnerable to sensitive information disclosure due to a file path disclosure in the publicly accessible ~/db_backup_log.txt file which grants attackers the full path of the site, in addition to the path of database backup files. This affects versions up to, and including, 5.1.

Weakness: CWE-459 (Incomplete Cleanup), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2021-39327?

It affects 1 product.


Products: Ait-Pro Bulletproof Security.

## How do I fix CVE-2021-39327?

No fix has been published for CVE-2021-39327 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-39327 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-39327 exists.

Public exploit code:

- Wordpress BulletProof Security Backup Disclosure (metasploit)
- Wordpress Plugin BulletProof Security 5.1 - Sensitive Information Disclosure (exploitdb)
- WordPress BulletProof Security 5.1 Information Disclosure (nuclei): http/cves/2021/CVE-2021-39327.yaml

## Other vulnerabilities in AITpro BulletProof Security

- [CVE-2014-7959](https://insights.sbomify.com/CVE-2014-7959/): SQL injection in n/a (medium 6.5)
- [CVE-2014-8749](https://insights.sbomify.com/CVE-2014-8749/): Server-side request forgery in n/a (medium 5.0)
- [CVE-2022-1265](https://insights.sbomify.com/CVE-2022-1265/): BulletProof Security < 6.1 - Admin+ Stored Cross-Site Scripting (medium 4.8)
- [CVE-2022-0590](https://insights.sbomify.com/CVE-2022-0590/): BulletProof Security < 5.8 - Admin+ Stored Cross-Site Scripting (XSS) (medium 4.8)
- [CVE-2015-9230](https://insights.sbomify.com/CVE-2015-9230/): Cross-site scripting in n/a (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-39327 and fix it if it is affected.

What it is: CVE-2021-39327 is a medium-severity vulnerability in AITpro BulletProof Security, published on 17 Sep 2021. 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-2021-39327 exists.

Affected product: AITpro BulletProof Security. 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-2021-39327/ (Markdown: https://insights.sbomify.com/CVE-2021-39327/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39327
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39327
- OSV: https://osv.dev/vulnerability/CVE-2021-39327

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-39327/
Summaries are generated and may contain mistakes; the official description above is the record.