Vulnerability in Xiaochong0302 Course-Tencent-Cloud
CVE-2026-111675
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover (third-party-advisory)
- github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.p… (technical-description)
- github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Ac… (technical-description)
- www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-co… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111675?
- CVE-2026-111675 is a high-severity vulnerability in Xiaochong0302 Course-Tencent-Cloud, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.4/10. Published 2026-10-16.
- How severe is CVE-2026-111675?
- High severity. CVSS v3 base score is 7.4 out of 10.