CVE-2026-101888: Prime Mover Zip Slip path traversal in ZIP import

CVE-2026-101888 · Severity: high · CVSS 7.2 · Published 2026-10-01

Prime Mover is a WordPress backup and migration plugin that transfers WordPress sites between servers. A flaw in how it extracts ZIP files during migration allows authenticated administrators to write arbitrary files anywhere on the server, which could lead to malicious code execution and complete site compromise. An attacker with admin access could craft a specially-formatted backup file to place executable code where it will be run by WordPress.

Technologies: Codexonics Prime Mover. Vendors: Codexonics.

Quick answers

Is CVE-2026-101888 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-101888 being exploited in the wild.
How severe is CVE-2026-101888?
High severity, with a CVSS score of 7.2, published 1 October 2026.
Which products and versions are affected?
Codexonics Prime Mover before 2.2.1.
Is there a fix for CVE-2026-101888?
Yes: fixed in 2.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-101888 attacked?
It is attacked over the network.
Am I affected by CVE-2026-101888?
Check whether you run Codexonics Prime Mover at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 2.2.1

Technical details

The plugin fails to properly validate ZIP entry names in computeExtractionParameters() and resumableZipExtractor() functions within utilities/PrimeMoverSystemCheckUtilities.php, allowing directory traversal sequences (e.g., "../../../") to escape the intended extraction directory. An authenticated administrator can exploit this Zip Slip vulnerability by crafting a malicious ZIP file with traversal sequences in entry names to write arbitrary files to filesystem locations outside the extraction directory, potentially achieving remote code execution if written files are executed by the web environment.

Affected products

  • Codexonics Prime Mover before 2.2.1

Timeline

  • 2026-10-01: disclosed

References

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