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CVE-2026-4031— Database Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Database Backup Interception

CVSS 7.5 · High
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I. Basic Information for CVE-2026-4031

Vulnerability Information
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Vulnerability Title
Database Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Database Backup Interception
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Database Backup for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.5.2. This is due to the plugin not restricting access to the wp_db_temp_dir parameter, which controls where database backups are written. This makes it possible for unauthenticated attackers to send a request to wp-cron.php with a poisoned wp_db_temp_dir value pointing to a publicly accessible directory (e.g., wp-content/uploads/), and if a scheduled backup is due, intercept the backup file before it is cleaned up. The backup file has a predictable name based on the database name, table prefix, date, and Swatch Internet Time, making interception reliable. Successful exploitation leads to Sensitive Information Exposure including database credentials, user password hashes, and personally identifiable information. This vulnerability requires that the site administrator has configured scheduled backups.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
wpengineDatabase Backup for WordPress 0 ~ 2.5.2 -

II. Public POCs for CVE-2026-4031

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III. Intelligence Information for CVE-2026-4031

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Same Patch Batch · wpengine · 2026-05-14 · 3 CVEs total

CVE-2026-40308.1 HIGHDatabase Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Arbitrar
CVE-2026-40297.5 HIGHDatabase Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Database

IV. Related Vulnerabilities

Same product: Database Backup for WordPress
Same vendor: wpengine
Same weakness: CWE-862

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