Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Discuz! / Discuz! X5.0 | affected 20260320 through 20260610 |
CWE
CWE-804
References
- https://karmainsecurity.com/KIS-2026-10
- https://karmainsecurity.com/chaining-bugs-in-discuz-from-race-condition-to-rce
- https://www.vulncheck.com/advisories/discuz-x5-0-captcha-bypass-via-predictable-character-set
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.