CVE-2026-104743
Tainacan <= 1.3.0 - Authenticated (Editor+) Path Traversal to Arbitrary File Read via 'tmp_file' Parameter via Mass Assignment
Description
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.
INFO
Published Date :
Oct. 28, 2026, 7:16 a.m.
Last Modified :
Oct. 28, 2026, 7:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Tainacan plugin to the latest version.
- Remove any persisted poisoned importer paths.
- Monitor server for unauthorized file access.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-104743.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-104743 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-104743
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-104743 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-104743 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 28, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-22 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/104xxx/CVE-2026-104743.json">CVE-2026-104743</a> Added Reference https://github.com/tainacan/tainacan/commit/1cc2c179d213670ae4bd378473d6fecbc35c6357 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-importers-controller.php#L146 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-importers-controller.php#L190 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-importers-controller.php#L223 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/api/endpoints/class-tainacan-rest-importers-controller.php#L266 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/background-process/importer/class-tainacan-csv.php#L334 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/background-process/importer/class-tainacan-csv.php#L36 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/background-process/importer/class-tainacan-csv.php#L93 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.3.0/classes/background-process/importer/class-tainacan-importer.php#L255 Added Reference https://plugins.trac.wordpress.org/browser/tainacan/tags/1.4.0/classes/api/endpoints/class-tainacan-rest-importers-controller.php Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/e16bda6d-0818-468b-9114-82a8f5f68caf?source=cve