{"id":"CVE-2018-1000503","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-1000503","generatedAt":"2026-10-29T00:43:03.049Z","title":"MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password.","description":"MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password. This attack appear to be exploitable via Subscribe to a forum through IDOR. This vulnerability appears to have been fixed in 1.8.15.","published":"2018-06-26T16:29:01.000Z","lastModified":"2026-06-17T01:32:48.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-269"],"affected":["mybb/mybb"],"epss":{"score":0.00623,"percentile":0.49649,"date":"2026-10-27","history":[]},"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 (0.62%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.batterystapl.es/2018/03/local-file-inclusion-and-reading.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.batterystapl.es/2018/03/local-file-inclusion-and-reading.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.mybb.com/2018/03/15/mybb-1-8-15-released-security-maintenance-release/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-1000503","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."}