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CVE-2026-1921

MEDIUM 4.9 CVSS 3.1
Published
May 5, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-22
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Description

The Loco Translate plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 2.8.2 via the `fsReference` AJAX route. This is due to the `findSourceFile()` method normalizing user-supplied `ref` paths containing `../` directory traversal sequences without validating that the resolved path remains within the intended bundle or content directory. This makes it possible for authenticated attackers, with Translator-level access and above (custom `loco_admin` capability required, granted to the `translator` role and administrators by default), to read arbitrary `.php`, `.js`, `.json`, and `.twig` files from the server filesystem outside the intended translation directory. Files named wp-config.php are excluded.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • timwhitlock Loco Translate — Up to and including 2.8.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.1/src/ajax/FsReferenceController.php#L12
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.1/src/ajax/FsReferenceController.php#L92
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/loco-translate/trunk/src/ajax/FsReferenceController.php#L12
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/loco-translate/trunk/src/ajax/FsReferenceController.php#L92
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3482475/loco-translate/trunk/tpl/admin/config/version.php
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=%2Floco-translate/tags/2.8.2&new_path=%2Floco-translate/tags/2.8.3
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/f9ff3058-a08c-40ed-b756-81e703b2277a?source=cve
  • nvd.nist.gov Official NVD record