{"id":"CVE-2023-44763","aliases":["EUVD-2023-2833","GHSA-wrp2-6v6j-hfmg"],"status":"disputed","title":"ConcreteCMS vulnerable to Stored Cross-site Scripting","description":"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.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00714,"percentile":0.54013,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-434","CWE-79"],"published":"2023-10-10T00:00:00Z","modified":"2026-10-28T02:30:32Z","exploits":[{"source":"pocgithub","id":"sromanhu/CVE-2023-44763_ConcreteCMS-Arbitrary-file-upload-Thumbnail","title":"sromanhu/CVE-2023-44763_ConcreteCMS-Arbitrary-file-upload-Thumbnail","date":"2023-09-25","url":"https://github.com/sromanhu/CVE-2023-44763_ConcreteCMS-Arbitrary-file-upload-Thumbnail"}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"concrete5/concrete5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"9.2.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"concrete5/concrete5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"9.2.1"}]}],"versions":["8.0","8.0.1","8.0.2","8.0.3","8.1.0","8.2.0","8.2.0RC2","8.2.1","8.3.0","8.3.1","8.3.2","8.4.0","8.4.0RC3","8.4.0RC4","8.4.1","8.4.2","8.4.3","8.4.4","8.4.5","8.5.0","8.5.0RC1","8.5.0RC2","8.5.1","8.5.10","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.17","8.5.18","8.5.19","8.5.2","8.5.20","8.5.21","8.5.3","8.5.4","8.5.5","8.5.6","8.5.6RC1","8.5.7","8.5.8","8.5.9","9.0.0","9.0.0RC1","9.0.0RC3","9.0.0RC4","9.0.1","9.0.2","9.1.0","9.1.1","9.1.2","9.1.3","9.2.0","9.2.0RC2","9.2.1"]}],"products":[{"vendor":"concretecms","product":"concrete_cms"}],"references":[{"url":"https://github.com/sromanhu/ConcreteCMS-Arbitrary-file-upload-Thumbnail","tags":["x_transferred","Exploit","Third Party Advisory","package","web"]},{"url":"https://www.concretecms.org/about/project-news/security/security-advisory-2023-10-25-concrete-cms-rejects-cve-2023-44763","tags":["x_transferred","advisory","web"]},{"url":"https://web.archive.org/web/20231026034159/https://documentation.concretecms.org/user-guide/editors-reference/dashboard/system-and-maintenance/files/allowed-file-types","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44763","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wrp2-6v6j-hfmg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/44xxx/CVE-2023-44763.json","tags":["advisory"]},{"url":"https://github.com/concretecms/concretecms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-44763","description":"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.","status":"disputed","published":"2023-10-10T00:00:00Z","modified":"2024-08-02T20:07:33.445Z","updated_at":"2026-11-02T14:35:21.612665Z"}],"euvd":[{"id":"EUVD-2023-2833","description":"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.","status":"published","published":"2023-10-10T00:00:00Z","modified":"2024-08-02T20:07:33Z","updated_at":"2026-11-03T03:49:59.530903Z"}],"ghsa":[{"id":"GHSA-wrp2-6v6j-hfmg","title":"ConcreteCMS vulnerable to Stored Cross-site Scripting","description":"Concrete CMS v9.2.1 is affected by Arbitrary File Upload vulnerability via the Thumbnail file upload, which allows Cross-Site Scripting (XSS).","status":"published","published":"2023-10-10T12:32:12Z","modified":"2023-11-09T05:04:04Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79","CWE-434"],"updated_at":"2026-11-02T14:37:17.64478Z"}],"nvd":[{"id":"CVE-2023-44763","description":"Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). 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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.","status":"published","published":"2023-10-10T00:00:00Z","modified":"2026-10-28T02:30:32.714335739Z","updated_at":"2026-11-02T15:44:33.792101Z"}]}}