CVE-2026-116409: Upsell Funnel Builder for WooCommerce reflected cross-site scripting (XSS) vulnerability

high 7.1 published 2026-10-29

Affected versions: 3.1.6 and older
Fixed in: 3.1.7 *
Latest version: 3.1.7
Severity: High · CVSS 7.1
Active installs: 2,000+
Type: Reflected cross-site scripting (XSS)

* The source does not name a fixed version; this is the first wordpress.org release after the last affected version.

What an attacker needs

Access: None. No account or login is needed (per the CVSS score).
Interaction: It also needs someone on the site (often an admin) to click a link, open a page or submit a form the attacker prepared.

CVSS vector (score by Patchstack): CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What to do now

Update Upsell Funnel Builder for WooCommerce to 3.1.7 or newer: Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
Not sure which version you run? Check your version against every known Upsell Funnel Builder for WooCommerce issue. With WP-CLI: wp plugin get upsell-order-bump-offer-for-woocommerce --field=version.
If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.

The advisory

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Swings Upsell Order Bump Offer for WooCommerce upsell-order-bump-offer-for-woocommerce allows Reflected XSS.This issue affects Upsell Order Bump Offer for WooCommerce: from n/a through 3.1.6.

Description from the CVE record, published by Patchstack (the CVE Numbering Authority), via the NVD entry for CVE-2026-116409.

References

NVD CVE-2026-116409 nvd.nist.gov
Patchstack advisory patchstack.com

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.

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/upsell-order-bump-offer-for-woocommerce (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.