CVE-2021-39327Public exploitNetwork attack vector

Unauthenticated path disclosure via public backup log

Published Sep 17, 2021 · Updated Mar 31, 2025

Information disclosure in AITpro BulletProof Security 5.1 and earlier allows remote attackers to read server and backup paths. The plugin writes absolute WordPress and database-backup paths to db_backup_log.txt in web-accessible directories without preventing unauthenticated HTTP retrieval. No authentication or user interaction is required; disclosure is limited to filesystem paths, with no reported direct access to backup contents.

CVSS severity5.3
Medium
EPSS probability71.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in AITpro BulletProof Security 5.1 and earlier allows remote attackers to read server and backup paths. The plugin writes absolute WordPress and database-backup paths to db_backup_log.txt in web-accessible directories without preventing unauthenticated HTTP retrieval. No authentication or user interaction is required; disclosure is limited to filesystem paths, with no reported direct access to backup contents.

The record

CVE
CVE-2021-39327
Published
Sep 17, 2021
Updated
Mar 31, 2025
Vendor
AITpro
Product
BulletProof Security
Classifications
CWE-200, CWE-459, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1 <=5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AITpro · BulletProof Securityversion=5.1 <=5.1

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-459Incomplete Cleanup
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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