# CVE-2026-101890: Prime Mover stored cross-site scripting in package metadata

Source: https://junglewise.ai/threats/cve-2026-101890-the-prime-mover-plugin-for-wordpress-before-2-2-1-contains-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-101890 · Severity: medium · CVSS 5.4 · Published 2026-10-01

Prime Mover is a WordPress plugin that backs up and migrates WordPress sites. A stored cross-site scripting flaw allows attackers to inject malicious code into a backup package's metadata file, which then executes in an administrator's browser when they view the list of backups. An attacker can exploit this without the administrator restoring the package, potentially compromising the administrator's account or the WordPress installation.

Technologies: [Codexonics Prime Mover](https://junglewise.ai/threats/technologies/prime-mover). Vendors: [Codexonics](https://junglewise.ai/threats/vendors/codexonics).

## Quick answers

**Is CVE-2026-101890 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101890 being exploited in the wild.

**How severe is CVE-2026-101890?** Medium severity, with a CVSS score of 5.4, published 1 October 2026.

**Which products and versions are affected?** Codexonics Prime Mover before 2.2.1.

**Is there a fix for CVE-2026-101890?** Yes: fixed in Prime Mover 2.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-101890 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-101890?** 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 Prime Mover 2.2.1

## Technical details

The vulnerability is a stored cross-site scripting (XSS) flaw in the column_site_title() method of PrimeMoverBackupMenuListTable.php, where the site_title value from a package's footprint.json file is rendered without proper escaping. An attacker with access to the prime-mover-export-files directory can craft a malicious backup package with JavaScript in the site_title field; when an administrator views the Packages list, the unescaped JavaScript executes in their browser. The attack requires the attacker to place the crafted package on the target server but does not require package restoration.

## Affected products

- Codexonics Prime Mover before 2.2.1

## Timeline

- 2026-10-01: disclosed

## References

- [https://wordpress.org/plugins/prime-mover/](https://wordpress.org/plugins/prime-mover/)
- [https://www.vulncheck.com/advisories/prime-mover-stored-xss-via-package-metadata](https://www.vulncheck.com/advisories/prime-mover-stored-xss-via-package-metadata)

## Related threats

- [Prime Mover WordPress plugin path traversal in wprime-config.json](https://junglewise.ai/threats/cve-2026-101889-the-prime-mover-plugin-for-wordpress-before-2-2-1-contains-a)
- [Prime Mover Zip Slip path traversal in ZIP import](https://junglewise.ai/threats/cve-2026-101888-the-prime-mover-plugin-for-wordpress-before-2-2-1-contains-a-zip)