CVE-2021-39327
MediumPublic exploitThe 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.
Published Sep 17, 2021 · Updated Mar 31, 2025 · Also known as 4735c491-9595-42b8-bb1c-1b18c89fcf7a
Key Facts
Patch immediately- CVE-2021-39327 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting BulletProof Security (Ait-Pro).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 72% probability of exploitation in the next 30 days.
- Fixed versions are available, including BulletProof Security <=5.1, BulletProof Security 5.2, BulletProof Security 5.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
72%
Higher than 99.4% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-39327 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| BulletProof SecurityAit-Pro | >= 5.1 | 5.1 |
Patched Releases
BulletProof Security
<=5.1, 5.2
Timeline
Publicly disclosed
Sep 17, 2021
Last updated
Mar 31, 2025
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- CWE-459 Incomplete Cleanup
References
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/4735c491-9595-42b8-bb1c-1b18c89fcf7a?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/4735c491-9595-42b8-bb1c-1b18c89fcf7a?source=api-scan
- advisoryhttps://www.wordfence.com/vulnerability-advisories/#CVE-2021-39327
- patchhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2591118%40bulletproof-security&new=2591118%40bulletproof-security&sfp_email=&sfph_mail=
- exploithttp://packetstormsecurity.com/files/164420/WordPress-BulletProof-Security-5.1-Information-Disclosure.html
FAQ
Common Questions.
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.
Affected: BulletProof Security (Ait-Pro) versions >= 5.1. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including BulletProof Security <=5.1, BulletProof Security 5.2, BulletProof Security 5.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2021-39327 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo