CVE-2026-86828
MediumCVSS 6.6Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
The BackWPup WordPress plugin before 5.7.7 does not properly restrict the destination path of files extracted during a backup restore when its fallback archive library is used, allowing high-privileged users to write files outside the intended restore directory, potentially leading to remote code execution.
Risk Assessment
A user with administrative privileges can place malicious files in critical server locations, potentially leading to full site compromise.
Recommendation
Update the BackWPup plugin to version 5.7.7 or later, which properly restricts destination paths during restore.
Other vulnerabilities in BackWPup
See all- CVE-2026-86827Medium
The BackWPup WordPress plugin before 5.7.7 does not verify that a request to its cron-triggered backup execution handler actually originates from WordPress's internal scheduled-event dispatch, allowing unauthenticated attackers to force any existing backup job to run immediately, independent of its configured trigger type or schedule.
- CVE-2026-86826Medium
The BackWPup WordPress plugin before 5.7.7 does not properly restrict web access to the working directory it uses during backup restores, allowing unauthenticated attackers, on webservers that do not honour .htaccess rules such as NGINX, to download the full backup archive (database dump and site files, including credentials and secret keys) left behind by an interrupted restore.
- CVE-2026-86815Medium
The BackWPup WordPress plugin before 5.7.5 does not properly restrict access to several of its REST API routes for job, backup-destination, and backup-execution management, allowing users holding a plugin-defined, administrator-assigned limited role to create and run backup jobs and exfiltrate a full database backup to an attacker-controlled destination.
- CVE-2026-65443High
A Cross Site Scripting (XSS) vulnerability in the BackWPup plugin for WordPress versions up to 5.7.4. An unauthenticated attacker can inject a malicious script.
- CVE-2025-10579Medium
The BackWPup – WordPress Backup & Restore Plugin (versions up to and including 5.5.0) is vulnerable to unauthorized access of data due to a missing capability check on the 'backwpup_working' AJAX action. An authenticated attacker with Subscriber-level access or above can retrieve a backup's filename while a backup is running.
Original NVD description (English source)
The BackWPup WordPress plugin before 5.7.7 does not properly restrict the destination path of files extracted during a backup restore when its fallback archive library is used, allowing high-privileged users to write files outside the intended restore directory, potentially leading to remote code execution.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS