CVE-2026-127050

Backup Migration before 2.1.8 Path Traversal via PclZip Restore Fallback

Published Nov 12, 2026 CVSS 4.0 · 7.1 High EPSS n/a KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Inisev
Inisev backup Migration
Wordpress-extensions
Wordpress-extensions backup Migration
Vendors & Products Inisev
Inisev backup Migration
Wordpress-extensions
Wordpress-extensions backup Migration
Type Values Removed Values Added
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.
Title Backup Migration before 2.1.8 Path Traversal via PclZip Restore Fallback
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.1, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 12, 2026, 5:53 PM
Reserved
Nov 12, 2026, 12:23 PM
Status
Deferred
Published
Nov 12, 2026, 1:17 PM
Modified
Nov 12, 2026, 9:36 PM