CVE-2026-4409 — The Subscribe To Comments Reloaded plugin for WordPress is

title: WordPress Subscribe To Comments Reloaded - Leaked Secret Key Extraction - CVE-2026-4409
id: scw-2026-05-05-ai-1
status: experimental
level: critical
description: |
  Detects attempts to access the Subscribe To Comments Reloaded plugin's public pages with parameters that could be used to extract the leaked secret key, as described in CVE-2026-4409. This is a critical step for an attacker to forge authorization keys and manage subscriptions.
author: SCW Feed Engine (AI-generated)
date: 2026-05-05
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-4409/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/wp-content/plugins/subscribe-to-comments-reloaded/'
      cs-uri-query|contains:
          - 'stcr_nonce'
      sc-status:
          - 200
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse