Discuz! X5.0 CAPTCHA Bypass via Predictable Character Set
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Discuz! | Discuz! X5.0 | unknown |
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| Discuz | Discuzx |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.359% probability within 30 days)
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| CPEs | cpe:2.3:a:discuz:discuzx:*:*:*:*:*:*:*:* |
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| First Time appeared |
Discuz
Discuz discuzx |
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| Vendors & Products |
Discuz
Discuz discuzx |
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| References |
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| Metrics |
ssvc
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| Description | Discuz! X5.0 releases 20260320 through 20260501 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. | 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. |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Discuz! X5.0 releases 20260320 through 20260501 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. | |
| Title | Discuz! X5.0 CAPTCHA Bypass via Predictable Character Set | |
| Weaknesses | CWE-804 | |
| References |
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| Metrics |
cvssV3_1
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