WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels Plugin get_image_src_in_base64 path traversal

Summaryinfo

A vulnerability, which was classified as problematic, has been found in WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels Plugin up to 4.9.8. The affected element is the function get_image_src_in_base64. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2026-18027. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels Plugin up to 4.9.8. It has been classified as problematic. This affects the function get_image_src_in_base64. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-18027 since 07/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/23/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• WebToffee

Name

• WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels Plugin

Version

• 4.9.0
• 4.9.1
• 4.9.2
• 4.9.3
• 4.9.4
• 4.9.5
• 4.9.6
• 4.9.7
• 4.9.8

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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