---
id: CVE-2026-111675
title: >-
  Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account
  Takeover
summary: >-
  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 attemp…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-307
vendor: xiaochong0302
product: course-tencent-cloud
affected:
  - course-tencent-cloud <= 2.0.1
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:39:35.253Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111675'
references:
  - url: >-
      https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover
  - url: >-
      https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73
  - url: >-
      https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php
  - url: >-
      https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover
    label: >-
      VulnCheck Advisory: Course-tencent-cloud through 2.0.1 Verification Code
      Brute Force Account Takeover
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.666Z'
---

## Overview

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

- `course-tencent-cloud <= 2.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.