{"id":"CVE-2020-26768","details":"Formstone \u003c=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability caused by improper validation of user supplied input in the upload-target.php and upload-chunked.php files. A remote attacker could exploit this vulnerability using a specially crafted URL to execute a script in a victim's Web browser within the security context of the hosting Web site once the URL is clicked or visited. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials, force malware execution, user redirection and others.","aliases":["GHSA-wc29-h54q-q8qx"],"modified":"2026-04-10T04:26:11.905434Z","published":"2021-01-07T13:15:11.623Z","references":[{"type":"ADVISORY","url":"https://github.com/Formstone/Formstone/issues/286"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/formstone/formstone","events":[{"introduced":"0"},{"last_affected":"ffde8f14b07f2b05af1490462b07494dbdab128b"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.4.16"}]}}],"versions":["0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6","0.4.7","0.5.0","0.5.1","0.5.10","0.5.11","0.5.12","0.5.13","0.5.14","0.5.15","0.5.16","0.5.2","0.5.3","0.5.5","0.5.6","0.5.7","0.5.8","0.5.9","0.6.0","0.6.10","0.6.11","0.6.12","0.6.3","0.6.4","0.6.5","0.6.6","0.6.7","0.6.8","0.6.9","0.7.10","0.7.14","0.7.7","0.7.8","0.8.10","0.8.11","0.8.12","0.8.13","0.8.15","0.8.16","0.8.17","0.8.18","0.8.19","0.8.20","0.8.21","0.8.22","0.8.23","0.8.24","0.8.25","0.8.26","0.8.27","0.8.28","0.8.29","0.8.5","0.8.6","0.8.7","0.8.8","0.8.9","1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.3.3","1.4.0","1.4.1","1.4.10","1.4.11","1.4.12","1.4.13","1.4.13-1","1.4.13.1","1.4.14","1.4.15","1.4.15-1","1.4.16","1.4.2","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","1.4.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26768.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}