CVE-2021-39327: The BulletProof Security WordPress plugin is vulnerable to sensitive information disclosure due to a file path

Q: How do I fix CVE-2021-39327?

bulletproof security: upgrade to newer than 5.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-39327 being exploited?

CVE-2021-39327 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-39327 affect?

CVE-2021-39327 affects bulletproof security. Severity is medium (CVSS 5.3). 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 t

Q: How urgent is CVE-2021-39327?

Priority 53/100. EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2021-39327 is a medium-severity flaw (CVSS 5.3) affecting bulletproof security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	71.7% (top 1%)
CISA exploited list	No
Weakness	CWE-200, CWE-459
Published	2021-09-17
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: ait-pro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-17 11:15 UTCPublished CVE record published
2026-06-17 04:03 UTCUpdated Record last modified

ait-pro bulletproof security UPGRADE

Affected: <= 5.1

Fixed in: newer than 5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bulletproof-security || rpm -q bulletproof-security || bulletproof-security --version

2. UPGRADE to newer than 5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bulletproof-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bulletproof-security

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Wordpress Plugin BulletProof Security 5.1 - Sensitive Information Disclosure
Metasploit: Wordpress BulletProof Security Backup Disclosure
Nuclei scan template: WordPress BulletProof Security 5.1 Information Disclosure

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-39327?

bulletproof security: upgrade to newer than 5.1. Exact commands for each OS are on this page.

Is CVE-2021-39327 being exploited?

CVE-2021-39327 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-39327 affect?

CVE-2021-39327 affects bulletproof security. Severity is medium (CVSS 5.3). 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 t

How urgent is CVE-2021-39327?

Priority 53/100. EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2022-1265 MEDIUM 4.8 UPGRADE The BulletProof Security WordPress plugin before 6.1 does not sanitize and escape some of its CAPTCHA settings
CVE-2022-0590 MEDIUM 4.8 UPGRADE The BulletProof Security WordPress plugin before 5.8 does not sanitise and escape some of its settings, which

References

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