Tainacan Plugin up to 1.3.0 on WordPress Importer fopen/fgetcsv tmp_file path traversal

Summaryinfo

A vulnerability was found in Tainacan Plugin up to 1.3.0 and classified as problematic. Affected by this vulnerability is the function fopen/fgetcsv of the component Importer. The manipulation of the argument tmp_file results in path traversal. This vulnerability is identified as CVE-2026-104743. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Tainacan Plugin up to 1.3.0. Affected is the function fopen/fgetcsv of the component Importer. The manipulation of the argument tmp_file 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. CVE summarizes:

The Tainacan plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 1.3.0 via the 'tmp_file' parameter parameter. This makes it possible for authenticated attackers, with editor-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The poisoned importer path is persisted to the database and later triggered via a separate GET request to the /source_info endpoint, which passes the attacker-controlled path to fopen() and fgetcsv() and returns parsed file contents in the REST response.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-104743 since 10/02/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Name

• Tainacan Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3.0

CPE 2.3info

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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