← Vulnerability feed

Vulnerability record · CVE-2026-4031 · published 14 May 2026

CVE-2026-4031: Missing authorization vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.57% · top 54.9% CWE-862 · Missing authorization Deferred
7.5CVSS 3.1 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/wp-db-backup/tags/2.5.2/wp-db-backup.php#L121
https://plugins.trac.wordpress.org/browser/wp-db-backup/trunk/wp-db-backup.php#L121
https://plugins.trac.wordpress.org/browser/wp-db-backup/trunk/wp-db-backup.php#L1568
https://plugins.trac.wordpress.org/browser/wp-db-backup/trunk/wp-db-backup.php#L85
https://plugins.trac.wordpress.org/browser/wp-db-backup/trunk/wp-db-backup.php#L961
https://plugins.trac.wordpress.org/changeset/3510595/
https://www.wordfence.com/threat-intel/vulnerabilities/id/36615cae-418f-48b0-ba69-b54515cbe1d7?source=cve

Track CVE-2026-4031 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-84869ScreenConnect client allows unauthorized file transfer and execution in remote sessionsA flaw in the ConnectWise ScreenConnect client lets files be transferred and executed inside an active remote session without authorization or Host c…KEVEPSS 0.92%analysed7.8CVE-2022-0492Linux kernel cgroups v1 release_agent privilege escalation and container escapeThe Linux kernel's cgroup_release_agent_write in kernel/cgroup/cgroup-v1.c mishandles authorization, letting the cgroups v1 release_agent feature be …KEVEPSS 5.5%analysed9.9CVE-2024-57726SimpleHelp missing authorization lets low-privilege technicians escalate to adminSimpleHelp remote support software v5.5.7 and earlier fails to properly authorize API key creation, allowing low-privilege technicians to mint API ke…KEVEPSS 67%analysed8.8CVE-2023-52163Digiever DS-2105 Pro time_tzsetup.cgi command injectionDigiever DS-2105 Pro firmware 3.1.0.71-11 exposes time_tzsetup.cgi to command injection, and the record also maps the issue to CWE-862 missing author…KEVEPSS 97%analysed6.6CVE-2025-40602SonicWall SMA1000 management console missing authorization privilege escalationThe SonicWall SMA1000 appliance management console (AMC) contains a local privilege escalation flaw caused by insufficient authorization, mapped to C…KEVEPSS 2.8%analysed9.1CVE-2025-6205DELMIA Apriso missing authorization allows privileged accessDELMIA Apriso Releases 2020 through 2025 contain a missing authorization flaw (CWE-862) that lets an attacker obtain privileged access to the applica…KEVEPSS 73%analysed8.6CVE-2025-20362Cisco Secure Firewall ASA/FTD VPN web server missing authorizationThe VPN web server in Cisco Secure Firewall ASA and FTD software fails to properly validate user-supplied input in HTTP(S) requests, allowing access …KEVEPSS 87%analysed7.3CVE-2021-39226Grafana snapshot endpoints allow unauthenticated view and deleteGrafana exposes snapshot endpoints that resolve to the snapshot with the lowest database key when accessed via literal paths such as /dashboard/snaps…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2026-4031), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.