{"id":"CVE-2021-26804","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26804","generatedAt":"2026-10-28T01:52:26.375Z","title":"Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to \".gif\", then uploading it in the \"Administration/ Parameters/ Images\" section of the application.","description":"Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to \".gif\", then uploading it in the \"Administration/ Parameters/ Images\" section of the application.","published":"2021-05-04T17:15:08.000Z","lastModified":"2026-06-17T03:43:48.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-276"],"affected":["centreon/centreon web"],"epss":{"score":0.01189,"percentile":0.67721,"date":"2026-10-26","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 (1.19%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://medium.com/%40pedro.ferreira.phf/vulnerability-affecting-some-versions-of-centreon-2b34bd6dc621","source":"cve@mitre.org"},{"url":"https://medium.com/%40pedro.ferreira.phf/vulnerability-affecting-some-versions-of-centreon-2b34bd6dc621","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26804","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."}