PDF Invoices & Packing Slips for WooCommerce <= 5.16.5 — Unauthenticated Sensitive Information Exposure via Yearly-Reset Invoice Attachment Cache
CVE-2026-109217Published · Updated Action summary
Affected: ≤5.16.5Update to 5.16.6 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
PDF Invoices & Packing Slips for WooCommerce woocommerce-pdf-invoices-packing-slips
- Affected≤ 5.16.5
- Patched in5.16.6
Update to 5.16.6 or newer.
You are affected if you run ≤ 5.16.5. Version 5.16.6 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under PDF Invoices & Packing Slips for WooCommerce.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 5.16.6, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch PDF Invoices & Packing Slips for WooCommerce to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Santh.
The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.16.5 via the 'invoice_number (via document filename)' parameter. This makes it possible for unauthenticated attackers to extract another customer's complete invoice PDF — including billing identity, shipping address, private order notes, line items, prices, dates, order ID, and invoice number — delivered directly to the attacker's email as an order confirmation attachment. Exploitation requires the plugin's yearly invoice number reset option to be enabled, and the attacker's guest-checkout order must trigger a processing email within 60 seconds of a victim order that shares the same yearly-reset invoice number.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in PDF Invoices & Packing Slips for WooCommerce
All 17| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Billing First Name / Last Name / Company / Customer Note fields at guest checkout ≤5.16.4Update to 5.16.5 | CVE-2026-107750 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Billing First Name / Last Name / Company Fields ≤5.16.1Update to 5.16.2 | CVE-2026-92244 | |
| Medium4.3 | Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Disclosure via 'order_id' Shortcode Attribute ≤5.14.0Update to 5.15.0 | CVE-2026-13116 | |
| Medium6.6 | Authenticated (Shop manager+) PHP Object Injection <5.9.0Update to 5.9.0 | CVE-2026-39472 | |
| Medium4.3 | Missing Authorization to Authenticated (Subscriber+) Peppol Identifier Modification ≤5.6.0Update to 5.7.0 | CVE-2026-1906 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Billing First Name / Last Name / Company / Customer Note fields at guest checkout
≤5.16.4Update to 5.16.5
- High7.2Unauthenticated Stored Cross-Site Scripting via Billing First Name / Last Name / Company Fields
≤5.16.1Update to 5.16.2
- Medium4.3Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Disclosure via 'order_id' Shortcode Attribute
≤5.14.0Update to 5.15.0
- Medium6.6Authenticated (Shop manager+) PHP Object Injection
<5.9.0Update to 5.9.0
- Medium4.3Missing Authorization to Authenticated (Subscriber+) Peppol Identifier Modification
≤5.6.0Update to 5.7.0
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.