Vulnerability · Published Oct 1, 2026 · Assigned by WPScan

CVE-2026-101148BackupSheep <= 1.8 - Unauthenticated Arbitrary File Deletion and Backup Exfiltration via Empty Integration Key

Critical 10.0

In plain English

A critical-severity security flaw in BackupSheep WordPress Backup Plugin from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.3%top 76.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	BackupSheep WordPress Backup Plugin	0 – through 1.8

Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/5d6fce13-34e3-4ec6-9b47-a78dd7c94fed/ exploit, vdb-entry, technical-description