Quick answers
- Is CVE-2026-111578 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111578 being exploited in the wild.
- How severe is CVE-2026-111578?
- High severity, with a CVSS score of 7.5, published 30 October 2026.
- Which products and versions are affected?
- WooCommerce PDF Invoices & Packing Slips 5.16.2 to 5.16.4.
- Is there a fix for CVE-2026-111578?
- Yes: fixed in 5.16.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-111578 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-111578?
- Check whether you run WooCommerce PDF Invoices & Packing Slips at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 5.16.5
Technical details
The plugin fails to properly escape customer-supplied input in order fields (billing address, shipping address, customer notes) before rendering them in PDF invoice and packing-slip output. An unauthenticated attacker can inject XSS payloads during guest checkout that persist in generated documents; the payload executes with administrator privileges when the documents are viewed. This is a stored XSS affecting all users who view affected invoices and packing slips.
Affected products
- WooCommerce PDF Invoices & Packing Slips 5.16.2 to 5.16.4
Timeline
- 2026-10-29: disclosed