{"id":"CVE-2021-3337","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-3337","generatedAt":"2026-10-28T00:31:58.749Z","title":"The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.","description":"The Hide-Thread-Content plugin through 2021-01-27 for MyBB allows remote attackers to bypass intended content-reading restrictions by clicking on reply or quote in the postbit.","published":"2021-01-28T20:15:13.000Z","lastModified":"2026-06-17T04:04:58.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-863"],"affected":["hide thread content project/hide thread content"],"epss":{"score":0.11602,"percentile":0.96012,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2021-01-29","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":49496,"kind":"exploit","title":"MyBB Hide Thread Content Plugin 1.0 - Information Disclosure","url":"https://www.exploit-db.com/exploits/49496","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/49496.txt","file":"exploits/php/webapps/49496.txt","published":"2021-01-29","added":"2021-01-29","updated":"2021-01-29","author":"0xB9","type":"webapps","platform":"php","port":null,"verified":false,"codes":["CVE-2021-3337"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 11.6%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/161185/MyBB-Hide-Thread-Content-1.0-Information-Disclosure.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://github.com/snlbaral/Hide-Thread-Content/issues/1","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/161185/MyBB-Hide-Thread-Content-1.0-Information-Disclosure.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/snlbaral/Hide-Thread-Content/issues/1","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3337","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."}