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CVE-2026-127050

HIGH 7.1 CVSS 4.0
Published
November 12, 2026
Last modified
November 12, 2026
NVD status
Received
Reported by
disclosure@vulncheck.com
Weakness
CWE-22
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Description

Backup Migration before 2.1.8 for WordPress contains a path traversal vulnerability in its PclZip restore fallback that allows an attacker to achieve arbitrary file write when an administrator restores a malicious backup archive on a server lacking the PHP zip extension. Attackers can craft a zip archive with entry names containing ".." sequences, which PclZip's extract() processes without the PCLZIP_OPT_EXTRACT_DIR_RESTRICTION option, writing a PHP file outside the intended extraction directory into the web-servable tree to achieve remote code execution.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • inisev Backup Migration — Before 2.1.8

References

  • wordpress.org https://wordpress.org/plugins/backup-backup/#developers
  • www.vulncheck.com https://www.vulncheck.com/advisories/backup-migration-before-path-traversal-via-pclzip-restore-fallback
  • nvd.nist.gov Official NVD record