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

Quick assessment

Affected
wpengine Database Backup for WordPress
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Database Backup for WordPress 2.5.2及之前版本存在安全漏洞，该漏洞源于未限制对wp_db_temp_dir参数的访问，可能导致未经身份验证的攻击者通过发送恶意请求拦截备份文件，导致敏

CVSS 7.5 · High EPSS 0.57% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpengine Database Backup for WordPress ≤ 2.5.2 affected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Database Backup for WordPress 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Database Backup for WordPress 2.5.2及之前版本存在安全漏洞，该漏洞源于未限制对wp_db_temp_dir参数的访问，可能导致未经身份验证的攻击者通过发送恶意请求拦截备份文件，导致敏
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpengine Database 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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Vendor Advisories for CVE-2026-4031 (1)

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

CVE-2026-4030 8.1 HIGH Database Backup for WordPress <= 2.5.2 - Missing Authorization to Unauthenticated Arbitrar
CVE-2026-4029 7.5 HIGH Database 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

V. Comments for CVE-2026-4031

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