CVE-2026-111368 (GCVE-0-2026-111368)
Vulnerability from cvelistv5
Published
2026-10-15 21:43
Modified
2026-10-16 14:14
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
ClassroomIO through 1.0.0 contains an insecure direct object reference vulnerability in the Hono API course submission routes that allows course tutors or admins to modify submissions in other courses. Attackers can supply their own course id with another course's submission UUID to PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status or delete submissions.
Impacted products
Vendor Product Version
classroomio ClassroomIO Version: 0   ≤ 1.0.0
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-111368",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T14:13:41.959968Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-16T14:14:38.123Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/classroomio/classroomio",
          "product": "ClassroomIO",
          "repo": "https://github.com/classroomio/classroomio",
          "vendor": "classroomio",
          "versions": [
            {
              "lessThanOrEqual": "1.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:classroomio:classroomio:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "1.0.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "hieuPenguinnn"
        }
      ],
      "datePublic": "2026-10-15T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "ClassroomIO through 1.0.0 contains an insecure direct object reference vulnerability in the Hono API course submission routes that allows course tutors or admins to modify submissions in other courses. Attackers can supply their own course id with another course\u0027s submission UUID to PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status or delete submissions."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-15T21:43:51.616Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/submission.ts"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/classroomio/classroomio/blob/v1.0.0/packages/db/src/queries/submission/submission.ts#L217-L245"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/classroomio/classroomio/commit/1844ad9671a0d9c2566d3431d82f34d39016242c"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/classroomio/classroomio"
        },
        {
          "name": "VulnCheck Advisory: ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/classroomio-through-1.0.0-idor-via-course-submission-update-grade-and-delete-routes"
        }
      ],
      "title": "ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-111368",
    "datePublished": "2026-10-15T21:43:51.616Z",
    "dateReserved": "2026-10-15T21:21:27.275Z",
    "dateUpdated": "2026-10-16T14:14:38.123Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"hieuPenguinnn\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"LOW\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"repo\": \"https://github.com/classroomio/classroomio\", \"vendor\": \"classroomio\", \"product\": \"ClassroomIO\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"1.0.0\"}], \"packageURL\": \"pkg:github/classroomio/classroomio\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-10-15T00:00:00.000Z\", \"references\": [{\"url\": \"https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/submission.ts\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/classroomio/classroomio/blob/v1.0.0/packages/db/src/queries/submission/submission.ts#L217-L245\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/classroomio/classroomio/commit/1844ad9671a0d9c2566d3431d82f34d39016242c\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/classroomio/classroomio\", \"tags\": [\"product\"]}, {\"url\": \"https://www.vulncheck.com/advisories/classroomio-through-1.0.0-idor-via-course-submission-update-grade-and-delete-routes\", \"name\": \"VulnCheck Advisory: ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"ClassroomIO through 1.0.0 contains an insecure direct object reference vulnerability in the Hono API course submission routes that allows course tutors or admins to modify submissions in other courses. Attackers can supply their own course id with another course\u0027s submission UUID to PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status or delete submissions.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"Authorization Bypass Through User-Controlled Key\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:classroomio:classroomio:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"1.0.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-10-15T21:43:51.616Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-111368\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T14:13:41.959968Z\"}}}], \"references\": [{\"url\": \"https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-10-16T14:14:05.755Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-111368\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-15T21:43:51.616Z\", \"dateReserved\": \"2026-10-15T21:21:27.275Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-10-15T21:43:51.616Z\", \"assignerShortName\": \"VulnCheck\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…