CVE-2026-111675
Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover
- State
- Published
- Severity
- 9.1 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 19, 2026
- Reserved
- Oct 16, 2026
Description
Course-tencent-cloud through 2.0.1 contains an improper restriction of authentication attempts vulnerability that allows unauthenticated attackers to brute force 6-digit SMS/email verification codes, which are never invalidated or attempt-limited. Attackers who know a victim's phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-307 Improper Restriction of Excessive Authentication Attempts
Affected Products
| Product | Versions |
|---|---|
course-tencent-cloudxiaochong0302 |
|
References
- https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeoverthird-party-advisory
- https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73technical-description
- https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.phptechnical-description
- VulnCheck Advisory: Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeoverthird-party-advisory
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