Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111675Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover

High 7.4

In plain English

A high-severity security flaw in course-tencent-cloud from xiaochong0302. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.5%top 54.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
xiaochong0302	course-tencent-cloud	0 – through 2.0.1

Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover third-party-advisory
https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73 technical-description
https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php technical-description
VulnCheck Advisory: Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover third-party-advisory