CVE-2026-18386
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.
Does this matter?
Lower severity and a low EPSS score (0.75%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.9 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.75% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Source
- security@wordfence.com
References
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/class-wpbackitup-admin.php#L1391
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L30
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L73
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L77
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/class-wpbackitup-admin.php#L1391
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L30
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L73
- https://plugins.trac.wordpress.org/browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L77
- https://www.wordfence.com/threat-intel/vulnerabilities/id/50272c8a-2e23-490d-8865-68ae49228895?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.