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CVE-2026-127050— Backup Migration before 2.1.8 Path Traversal via PclZip Restore Fallback

Quick assessment

Affected
inisev Backup Migration
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 Backup Migration 2.1.8 之前的版本存在路径遍历漏洞。该漏洞位于其 PclZip 恢复回退机制中：当管理员在缺少 PHP zip 扩展的服务器上恢复恶意备份归档时，攻击者可利用此漏洞实现任意文件写入。攻击者可以构造一个包含 ".." 序列的条目名称的 zip 归档；由于 PclZip 的 extract() 函数在调用时未设置 PCLZIP_OPT_EXTRACT_DIR_RESTRICTION 选项，该函数会将 PHP 文件提取到预期解压目录之外，并写入到 Web 可

CVSS 6.4 · Medium
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I. Basic Information for CVE-2026-127050

Vulnerability Information
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Vulnerability Title
Backup Migration before 2.1.8 Path Traversal via PclZip Restore Fallback
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
inisev Backup Migration 0 ~ 2.1.8 -

II. Public POCs for CVE-2026-127050

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III. Intelligence Information for CVE-2026-127050

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Other References for CVE-2026-127050 (2)

IV. Related Vulnerabilities

Same product: Backup Migration
Same vendor: inisev
Same weakness: CWE-22