CVE-2026-101148: CWE-73 External Control of File Name or Path in BackupSheep WordPress Backup Plugin
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.
AI Analysis
Technical Summary
CVE-2026-101148 is a critical vulnerability in the BackupSheep WordPress Backup Plugin versions up to 1.8. The plugin fails to properly validate its integration key, accepting unset or blank keys as valid. This flaw enables unauthenticated attackers to perform unauthorized actions including creating and downloading full site backups containing sensitive data such as user password hashes, and deleting arbitrary files on the server. The vulnerability is classified under CWE-73 (External Control of File Name or Path). The plugin has been closed on WordPress.org since July 2024 with no available fix.
Potential Impact
Exploitation of this vulnerability can lead to complete site compromise. Attackers can obtain full backups of the site, exposing sensitive data including user password hashes, and can delete arbitrary files on the server, potentially leading to site takeover and data loss. The CVSS v3.1 score is 10.0 (critical), reflecting the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
No fixed version of the plugin is available. The vendor has removed the plugin from WordPress.org since July 2024. The recommended mitigation is to immediately remove the BackupSheep WordPress Backup Plugin from any affected sites to prevent exploitation.
CVE-2026-101148: CWE-73 External Control of File Name or Path in BackupSheep WordPress Backup Plugin
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 v3.1
Score 10.0critical
Affected software
BackupSheep WordPress Backup Plugin
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-101148 is a critical vulnerability in the BackupSheep WordPress Backup Plugin versions up to 1.8. The plugin fails to properly validate its integration key, accepting unset or blank keys as valid. This flaw enables unauthenticated attackers to perform unauthorized actions including creating and downloading full site backups containing sensitive data such as user password hashes, and deleting arbitrary files on the server. The vulnerability is classified under CWE-73 (External Control of File Name or Path). The plugin has been closed on WordPress.org since July 2024 with no available fix.
Potential Impact
Exploitation of this vulnerability can lead to complete site compromise. Attackers can obtain full backups of the site, exposing sensitive data including user password hashes, and can delete arbitrary files on the server, potentially leading to site takeover and data loss. The CVSS v3.1 score is 10.0 (critical), reflecting the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
No fixed version of the plugin is available. The vendor has removed the plugin from WordPress.org since July 2024. The recommended mitigation is to immediately remove the BackupSheep WordPress Backup Plugin from any affected sites to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-28T08:14:28.260Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abe7490a43b0b3b89bd1cc4
Added to database: 10/01/2026, 14:56:16 UTC
Last enriched: 10/01/2026, 15:21:08 UTC
Last updated: 10/01/2026, 19:41:32 UTC
Views: 6
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