{"id":"CVE-2026-111368","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-111368","generatedAt":"2026-10-27T23:51:00.200Z","title":"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.","description":"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.","published":"2026-10-15T22:19:35.000Z","lastModified":"2026-10-16T18:25:45.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":6.1,"severity":"MEDIUM","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00291,"percentile":0.21508,"date":"2026-10-26","history":[{"date":"2026-10-16","score":0.00232,"percentile":0.1305}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T22:19:35.000Z","detail":{"score":"6.1","severity":"MEDIUM","publishedAt":"2026-10-15T22:19:34.847Z"},"summary":"New CVE, medium severity (CVSS 6.1)."}],"references":[{"url":"https://github.com/classroomio/classroomio","source":"disclosure@vulncheck.com"},{"url":"https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/submission.ts","source":"disclosure@vulncheck.com"},{"url":"https://github.com/classroomio/classroomio/blob/v1.0.0/packages/db/src/queries/submission/submission.ts#L217-L245","source":"disclosure@vulncheck.com"},{"url":"https://github.com/classroomio/classroomio/commit/1844ad9671a0d9c2566d3431d82f34d39016242c","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/classroomio-through-1.0.0-idor-via-course-submission-update-grade-and-delete-routes","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-111368","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}