BackWPup <= 4.0.1 - Authenticated (Administrator+) Directory Traversal

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• inpsyde backwpupbefore 4.0.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Wordfence). Independent of NVD's CPE analysis and usually ahead of it.

• wp_media BackWPup – WordPress Backup & Restore Plugin

  • up to and including 4.0.1affected · semver

Other highest-scoring records for the same primary product.

• CVE-2023-5504BackWPup <= 4.0.1 - Authenticated (Administrator+) Directory Traversal
  34Monitor
• CVE-2023-7164BackWPup < 4.0.4 - Unauthenticated Backup Download
  31Monitor
• CVE-2017-2551Vulnerability in Wordpress plugin BackWPup before v3.4.2 allows possible brute forcing of backup file for download.
  31Monitor
• CVE-2023-5775BackWPup <= 4.0.2 - Plaintext Storage of Backup Destination Password
  10Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const file = path.join(ROOT, req.query.name);2res.sendFile(file);

1const file = path.resolve(ROOT, req.query.name);2if (!file.startsWith(ROOT + path.sep)) {3  return res.sendStatus(400);4}5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.