CVE-2026-1921 — Path Traversal

title: WordPress Loco Translate Path Traversal - Free Tier
id: scw-2026-05-05-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-1921 by targeting the Loco Translate plugin's AJAX endpoint with a path traversal payload. This rule specifically looks for the 'loco_get_file' action and the 'fsReference' parameter containing directory traversal sequences ('../') to access files outside the intended directory. This is the most direct detection for the initial exploitation of this vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-05
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-1921/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/wp-admin/admin-ajax.php'
      cs-uri-query|contains:
          - 'action=loco_get_file'
      cs-uri-query|contains:
          - 'fsReference='
      cs-uri-query|contains:
          - '../'
  selection_base:
      cs-uri-query|contains:
          - 'file=' 
  condition: selection_base AND selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse