{"id":"CVE-2023-44763","aliases":["GHSA-wrp2-6v6j-hfmg"],"url":"https://o3.security/vulnerability/CVE-2023-44763","summary":"ConcreteCMS vulnerable to Stored Cross-site Scripting","details":"Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that \"pdf\" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration.","published":"2023-10-10T00:00:00Z","modified":"2026-07-15T01:49:11.991680525Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"concrete5/concrete5","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://web.archive.org/web/20231026034159/https://documentation.concretecms.org/user-guide/editors-reference/dashboard/system-and-maintenance/files/allowed-file-types"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/44xxx/CVE-2023-44763.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44763"},{"type":"ADVISORY","url":"https://www.concretecms.org/about/project-news/security/security-advisory-2023-10-25-concrete-cms-rejects-cve-2023-44763"},{"type":"PACKAGE","url":"https://github.com/sromanhu/ConcreteCMS-Arbitrary-file-upload-Thumbnail"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:11.991680525Z"}}