CVE-2026-111675
Course-tencent-cloud through 2.0.1 contains an improper restriction of authentication attempts…
- Risk score
- 56/100
- CVSS
- 7.4 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 16 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 rot…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.4 high
- Remotely exploitable without logging in
References
- https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php
- https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73
- https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover
- https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover
- https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover
Original 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.
Last activity 16 Oct 2026. Patch Forecast updates every hour.