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DNN Captcha Bypass Vulnerability Allowing Automated Requests

Vulnerability

A vulnerability in DNN's captcha generation algorithm allows created images to be easily interpreted by optical character recognition (OCR) tools. This weakness enables attackers to automate requests by using a robot to replicate the captcha responses. The issue is present in DNN versions prior to 9.13.8.

Impact

Exploitation of this vulnerability could lead to captcha bypass, allowing automated systems to send requests that would typically require human interaction to complete.

Remediation

Users can upgrade to DNN version 9.13.8 or later to address this vulnerability.

Added: Jun 9, 2025, 7:46 PM
Updated: Jun 9, 2025, 7:46 PM

Vulnerability Rating

Custom Algorithm
spread
5.2
impact
1.3
exploitability
7.2
remediation
7.7
relevance
0.0
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.