CVE-2026-18386
WP BackItUp Community Edition <= 2.1.0 - Authenticated (Administrator+) Path Traversal to Arbitrary File Read via 'backup_file' Parameter
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- cssimmon WP BackItUp Community Edition
through 2.1.0
References 9
plugins.trac.wordpress.org
- browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L77
- browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L73
- browser/wp-backitup/tags/2.1.0/lib/includes/handler_download.php#L30
- browser/wp-backitup/tags/2.1.0/lib/includes/class-wpbackitup-admin.php#L1391
- browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L77
- browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L73
- browser/wp-backitup/tags/2.0.0/lib/includes/handler_download.php#L30
- browser/wp-backitup/tags/2.0.0/lib/includes/class-wpbackitup-admin.php#L1391