CVE-2026-49953
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
6.5 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Vulnerability Description
Discuz! X5.0 releases 20260320 through 20260610 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical character recognition model against collected CAPTCHA samples to reliably predict challenge text, bypassing protections on login, registration, and other functionality from automated abuse.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-804
Source
NVD
Vendor
Discuz!
Product
Discuz! X5.0
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