CVE-2026-87855: JTL-Connector for WooCommerce arbitrary file upload vulnerability

critical 9.8 plugin closed published 2026-10-14

Affected versions: 2.4.3 and older
Fixed in: unknown
Severity: Critical · CVSS 9.8
Active installs: closed
Type: Arbitrary file upload

What an attacker needs

Access: None. No account or login is needed.

CVSS vector (score by Wordfence): CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do now

Replace JTL-Connector for WooCommerce. A closed plugin gets no updates through WordPress, so this hole stays open.
Deactivate and delete it once you have a replacement (Plugins → Deactivate → Delete). Deactivating alone leaves its files on the server.
Not sure which version you run? Check your version against every known JTL-Connector for WooCommerce issue.
If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.

The advisory

The JTL-Connector for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.4.3 via the saveImage() function. This is due to the startSession() function accepting an empty jtlauth parameter as a valid credential, combined with insufficient file type validation in handleImagePush(). This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

Description from the CVE record, published by Wordfence (the CVE Numbering Authority), via the NVD entry for CVE-2026-87855.

References

NVD CVE-2026-87855 nvd.nist.gov
Wordfence advisory www.wordfence.com
Plugin source plugins.trac.wordpress.org

Ran an affected version? Check your site for signs of a hack

The free scan reads the public side of your site and looks for spam pages, hidden redirects, injected scripts and blacklist entries. No login, no install, about a minute.

Already hacked? Flat $499 cleanup with a 30-day reinfection guarantee.

Where this data comes from

CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Versions and install counts: wordpress.org/plugins/woo-jtl-connector (Plugins API), fetched 2026-11-04.
The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.