Verification code brute force in course-tencent-cloud
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-307.
Summary
Course-tencent-cloud through 2.0.1 by xiaochong0302 does not restrict authentication attempts (CWE-307). Six-digit SMS and email verification codes are never invalidated or attempt-limited. An unauthenticated remote attacker who knows a victim's phone number or email address can brute force the code against the password reset and login endpoints while rotating source IP addresses, which takes over the account.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| xiaochong0302 | course-tencent-cloud | up to 2.0.1 | — | No fix listed | CNA |
- course-tencent-cloud Vendorxiaochong0302 Affected up to 2.0.1 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for course-tencent-cloud.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111675
- 2026-10-16 Alias added: GHSA-h2mg-h5vq-xqx3
- 2026-10-18 Priority changed: MEDIUM → LOW
- 2026-10-19 CISA SSVC decision points changed
- 2026-10-19 Priority changed: LOW → HIGH
References
Sources
- CVE-2026-111675 · CVE Program
- CVE-2026-111675 · NVD
- FIRST EPSS
- GHSA-h2mg-h5vq-xqx3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences