CVE-2026-18386
No known patch is available for this vulnerability.
The affected plugin has been removed from the WordPress.org directory, and no patched version is being distributed through the official directory. If you have the affected software installed, you should uninstall or replace it rather than wait for an update.
Description
The WP BackItUp Community Edition plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.1.0 via the 'backup_file' parameter parameter. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The basename() normalization present in the handler only executes when the traversed target path does not exist, providing no protection against reads of existing files.
Affected products
2- Range: <=2.1.0
Patches
Vulnerability mechanics
References
9- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/class-wpbackitup-admin.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/class-wpbackitup-admin.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.phpnvd
- plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.phpnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/50272c8a-2e23-490d-8865-68ae49228895nvd
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