CVE-2026-18386: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in cssimmon WP BackItUp Community Edition
The WP BackItUp Community Edition WordPress plugin contains a directory traversal vulnerability in all versions up to and including 2.1.0. This flaw allows authenticated users with administrator-level privileges or higher to read arbitrary files on the server via the 'backup_file' parameter. The existing basename() normalization only applies when the target path does not exist, failing to prevent access to existing files. This vulnerability has a medium severity rating with a CVSS score of 4.9.
AI Analysis
Technical Summary
CVE-2026-18386 is a directory traversal vulnerability (CWE-22) in the WP BackItUp Community Edition plugin for WordPress affecting all versions up to 2.1.0. Authenticated attackers with administrator privileges can exploit the 'backup_file' parameter to read arbitrary files on the server. The plugin's basename() normalization does not effectively prevent traversal attacks against existing files, allowing unauthorized file reads. No official remediation or patch has been published as of the data provided.
Potential Impact
An attacker with administrator-level access can read arbitrary files on the server, potentially exposing sensitive information. There is no indication of integrity or availability impact. The vulnerability requires high privileges (administrator) and network access but no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrator access to trusted users only and monitor for suspicious activity related to file access. No official patch or workaround is currently documented.
CVE-2026-18386: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in cssimmon WP BackItUp Community Edition
Description
The WP BackItUp Community Edition WordPress plugin contains a directory traversal vulnerability in all versions up to and including 2.1.0. This flaw allows authenticated users with administrator-level privileges or higher to read arbitrary files on the server via the 'backup_file' parameter. The existing basename() normalization only applies when the target path does not exist, failing to prevent access to existing files. This vulnerability has a medium severity rating with a CVSS score of 4.9.
CVSS v3.1
Score 4.9medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18386 is a directory traversal vulnerability (CWE-22) in the WP BackItUp Community Edition plugin for WordPress affecting all versions up to 2.1.0. Authenticated attackers with administrator privileges can exploit the 'backup_file' parameter to read arbitrary files on the server. The plugin's basename() normalization does not effectively prevent traversal attacks against existing files, allowing unauthorized file reads. No official remediation or patch has been published as of the data provided.
Potential Impact
An attacker with administrator-level access can read arbitrary files on the server, potentially exposing sensitive information. There is no indication of integrity or availability impact. The vulnerability requires high privileges (administrator) and network access but no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrator access to trusted users only and monitor for suspicious activity related to file access. No official patch or workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-30T12:57:05.405Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa2298bacd9273b4981754b
Added to database: 09/10/2026, 03:52:43 UTC
Last enriched: 09/10/2026, 04:08:04 UTC
Last updated: 09/10/2026, 04:12:07 UTC
Views: 4
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