BackWPup: Filesystem traversal

BackWPup is affected by filesystem traversal. Exploitation requires an authenticated WordPress account. A crafted path can escape the intended directory and reach files or directories elsewhere on the server.

CVE / CNA score 8.7 CVSS 3.1 · security@wordfence.com

NVD score 8.7 CVSS 3.1 · nvd@nist.gov

Component: BackWPup
Plugin slug: backwpup
Affected: See vendor advisory
Safe version: See mitigation notes
Published: Jan 11, 2024
Weakness: CWE-22 — Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

This CVE was published Jan 11, 2024 and is one of 12 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update BackWPup when a confirmed fixed release becomes available; until then, disable and remove it when the site's risk warrants.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The BackWPup plugin for WordPress is vulnerable to Directory Traversal in versions up to, and including, 4.0.1 via the Log File Folder. This allows authenticated attackers to store backups in arbitrary folders on the server provided they can be written to by the server. Additionally, default settings will place an index.php and a .htaccess file into the chosen directory (unless already present) when the first backup job is run that are intended to prevent directory listing and file access. This means that an attacker could set the backup directory to the root of another site in a shared environment and thus disable that site.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

NVD vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

References

Primary and upstream sources

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