Reported vulnerability

WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels <= 4.9.8 - Authenticated (Subscriber+) Arbitrary File Read via 'customer_note' Parameter

Q: Which versions of WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.9.8. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels?

Wordfence reports a fix for this issue in WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels. It lists these fixed versions: 5.0.0. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 22 Aug 2026

Updated 24 Aug 2026

CVE-2026-18027

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 6.5

The WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 4.9.8 via the get_image_src_in_base64 function. This makes it possible for authenticated attackers, with subscriber-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The base64-encoded file contents are embedded into the cached invoice HTML and served directly to the attacker via the plugin's own Print/Download invoice endpoints, which require only a valid nonce and access key.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels

Software: plugin · print-invoices-packing-slip-labels-for-woocommerce
Affected versions: Start version unspecified, through 4.9.8
Fix availability: Fix available
Fixed versions: 5.0.0

Recommended action

Update to version 5.0.0, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/a46f270f-d9cb-4bc1-8e10-3fc6646e1d78?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.9.8. Use the version checker above to compare your installed release with this report.

Is a fix available for WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels?

Wordfence reports a fix for this issue in WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels. It lists these fixed versions: 5.0.0. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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