| Title | xxyopen novel-plus 5.1.3 Improper Restriction of Excessive Authentication Attempts |
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| Description | The ajaxLogin method in the authentication module is vulnerable to a Captcha Replay Attack. The application correctly validates the user-submitted captcha against the one stored in the session but fails to invalidate or remove the captcha after its first use. This allows an attacker to reuse a single valid captcha indefinitely to perform automated brute-force or dictionary attacks against user passwords, completely bypassing the anti-automation security control. |
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| Source | ⚠️ https://blog.0xd00.com/blog/captcha-replay-attack-lead-to-brute-force-protection-bypass |
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| User | bpy9ft (UID 85221) |
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| Submission | 06/13/2025 07:52 (10 months ago) |
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| Moderation | 06/23/2025 16:32 (10 days later) |
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| Status | Accepted |
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| VulDB entry | 313652 [xxyopen/201206030 novel-plus up to 5.1.3 CATCHA LoginController.java ajaxLogin authentication replay] |
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| Points | 20 |
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