{"id":"CVE-2021-25877","title":"AVideo/YouPHPTube 10.0 and prior is affected by Insecure file write","summary":"AVideo/YouPHPTube 10.0 and prior is affected by Insecure file write. An administrator privileged user is able to write files on filesystem using flag and code variables in file save.php.","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"youphptube","product":"youphptube","affected":["youphptube <= 10.0"],"published":"2021-11-01","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-25877","references":[{"url":"https://synacktiv.com","label":"cve@mitre.org"},{"url":"https://www.synacktiv.com/sites/default/files/2021-01/YouPHPTube_Multiple_Vulnerabilities.pdf","label":"cve@mitre.org"},{"url":"http://avideoyouphptube.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://synacktiv.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.synacktiv.com/sites/default/files/2021-01/YouPHPTube_Multiple_Vulnerabilities.pdf","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01594,"epssPercentile":0.74216,"ingestedAt":"2026-07-06T17:03:23.606Z","slug":"CVE-2021-25877","body":"## Overview\n\nAVideo/YouPHPTube 10.0 and prior is affected by Insecure file write. An administrator privileged user is able to write files on filesystem using flag and code variables in file save.php.\n\n## Affected\n\n- `youphptube <= 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":39.6,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}