Vulnerability-Lookup

GHSA-H2MG-H5VQ-XQX3

Vulnerability from github – Published: 2026-10-16 18:34 – Updated: 2026-10-16 18:34

Details

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.

Severity

7.4 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

9.1 (Critical)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-111675"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-307"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-16T18:17:50Z",
    "severity": "CRITICAL"
  },
  "details": "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\u0027s phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts.",
  "id": "GHSA-h2mg-h5vq-xqx3",
  "modified": "2026-10-16T18:34:49Z",
  "published": "2026-10-16T18:34:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111675"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-111675 (GCVE-0-2026-111675)

Vulnerability from cvelistv5 – Published: 2026-10-16 17:39 – Updated: 2026-10-16 17:39

Title

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

Summary

Severity

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE

CWE-307 - Improper Restriction of Excessive Authentication Attempts

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6373 records in the last 180 days details

References

4 references

URL	Tags
https://hackmd.io/@hieuPenguinnn/ctc-verify-code-…	third-party-advisory
https://github.com/xiaochong0302/course-tencent-c…	technical-description
https://github.com/xiaochong0302/course-tencent-c…	technical-description
https://www.vulncheck.com/advisories/course-tence…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
xiaochong0302	course-tencent-cloud	Affected: 0 , ≤ 2.0.1 (custom)

Date Public

2026-10-15 00:00

Credits

hieuPenguinnn

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/xiaochong0302/course-tencent-cloud",
          "product": "course-tencent-cloud",
          "repo": "https://github.com/xiaochong0302/course-tencent-cloud",
          "vendor": "xiaochong0302",
          "versions": [
            {
              "lessThanOrEqual": "2.0.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "hieuPenguinnn"
        }
      ],
      "datePublic": "2026-10-15T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-307",
              "description": "Improper Restriction of Excessive Authentication Attempts",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-16T17:39:35.253Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php"
        },
        {
          "name": "VulnCheck Advisory: Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover"
        }
      ],
      "title": "Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-111675",
    "datePublished": "2026-10-16T17:39:35.253Z",
    "dateReserved": "2026-10-16T14:31:18.279Z",
    "dateUpdated": "2026-10-16T17:39:35.253Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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