{"id":"CVE-2026-63238","state":"PUBLISHED","title":"Authentication bypass vulnerability","description":"An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated\nattacker to take over any account, including administrator accounts, by\nsupplying a valid user UUID without providing primary credentials via the 2FA\nvalidation endpoint.","publishedAt":"2026-07-29T06:27:03.705Z","updatedAt":"2026-07-29T14:28:37.043Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","source":"CSA"},"assigner":"CSA","products":["Three Learning Koollab LMS"],"affected":[{"vendor":"Three Learning","product":"Koollab LMS","defaultStatus":"unaffected","versions":[{"version":"5.3.2","status":"affected"}]}],"references":["https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63238.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63238","state":"PUBLISHED","datePublished":"2026-07-29T06:27:03.705Z","dateUpdated":"2026-07-29T14:28:37.043Z","assignerShortName":"CSA","assignerOrgId":"5f57b9bf-260d-4433-bf07-b6a79e9bb7d4","dateReserved":"2026-07-16T02:35:54.249Z"},"containers":{"cna":{"title":"Authentication bypass vulnerability","descriptions":[{"lang":"en","value":"An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated\nattacker to take over any account, including administrator accounts, by\nsupplying a valid user UUID without providing primary credentials via the 2FA\nvalidation endpoint."}],"affected":[{"vendor":"Three Learning","product":"Koollab LMS","defaultStatus":"unaffected","versions":[{"version":"5.3.2","status":"affected"}]}],"references":[{"url":"https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"}}],"providerMetadata":{"shortName":"CSA","orgId":"5f57b9bf-260d-4433-bf07-b6a79e9bb7d4","dateUpdated":"2026-07-29T06:27:03.705Z"},"datePublic":"2026-07-29T06:07:00.000Z","source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-29T14:24:49.887591Z","id":"CVE-2026-63238","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","type":"CWE","lang":"en","description":"CWE-287 Improper Authentication"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-29T14:28:37.043Z"}}]}}}