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CVE-2026-104743— Tainacan <= 1.3.0 - Authenticated (Editor+) Path Traversal to Arbitrary File Read via 'tmp_file' Parameter via Mass Assignment

Quick assessment

Affected
tainacan Tainacan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Tainacan 插件在所有 1.3.0 及更早版本中，存在通过 参数触发的目录遍历漏洞。该漏洞允许拥有编辑者（editor）及以上权限的已认证攻击者读取服务器上的任意文件，这些文件可能包含敏感信息。攻击者注入的恶意导入路径会被持久化存储到数据库中，随后通过向 端点发起单独的 GET 请求来触发；该端点会将攻击者控制的路径传递给 和 函数，并在 REST API 响应中返回解析后的文件内容。

CVSS 4.9 · Medium

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-104743

Vulnerability Information
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Vulnerability Title
Tainacan <= 1.3.0 - Authenticated (Editor+) Path Traversal to Arbitrary File Read via 'tmp_file' Parameter via Mass Assignment
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tainacan Tainacan 0 ~ 1.3.0 -

II. Public POCs for CVE-2026-104743

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III. Intelligence Information for CVE-2026-104743

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Other References for CVE-2026-104743 (11)

IV. Related Vulnerabilities

Same product: Tainacan
Same vendor: tainacan
Same weakness: CWE-22