CVE-2026-101148
Received Received - Intake

BackupSheep WordPress Plugin Authentication Bypass

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: WPScan

Description
The BackupSheep WordPress Backup Plugin WordPress plugin through 1.8 does not properly validate its integration key, treating an unset or blank key as valid, which allows unauthenticated attackers to create and download full site backups, including the database with user password hashes, and to delete arbitrary files on the server, leading to sensitive data disclosure and site takeover. The BackupSheep WordPress Backup Plugin WordPress plugin through 1.8 has been closed on WordPress.org since July 2024 and no fixed version is available. Remove it from any site where it is installed.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-101148
EUVD
EUVD-2026-90507

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
backupsheep wordpress_backup_plugin to 1.8 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability affects the BackupSheep WordPress Backup Plugin versions up to 1.8. It fails to validate the integration key properly, treating an empty or unset key as valid. This allows unauthenticated attackers to exploit the flaw to create and download full site backups, including databases with user password hashes, and delete arbitrary files on the server.

Detection Guidance

Check if the BackupSheep WordPress Backup Plugin version 1.8 or earlier is installed on your WordPress site. Look for the plugin in the WordPress admin panel under Plugins. Alternatively, use WP-CLI with the command 'wp plugin list' to list all installed plugins and their versions.

Impact Analysis

Attackers can exploit this to steal sensitive data like password hashes, delete important files, or take over your entire website. Since no fixed version exists and the plugin was removed from WordPress.org, your site remains at risk if the plugin is still installed.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face legal penalties, fines, or reputational damage due to data breaches resulting from this flaw.

Mitigation Strategies

Immediately remove the BackupSheep WordPress Backup Plugin from your WordPress site. Since no fixed version is available and the plugin was removed from WordPress.org in July 2024, uninstalling it is the only mitigation. Review server logs for any signs of unauthorized backup creation or file deletion.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-101148. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart