CVE-2021-22968
mediumPriorität · verfolgen · 30OT-Risiko · erhöhtEPSS 0.032 · 88. PerzentilEUUSEPSS · bewertet 2026-10-28
A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below.The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration.To fix this, a check for allowed file extensions was added before downloading files to a tmp directory.Concrete CMS Security Team gave this a CVSS v3.1 score of 5.4 AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:NThis fix is also in Concrete version 9.0.0
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.5–7.2
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (3)
Betroffene Produkte und Versionsbereiche.
Advisories (1)
Hersteller- und Ökosystem-Meldungen dazu.
- GHSA-g3p2-hfqr-9m25Improper file handling in concrete5/core2021-11-23ghsa · osvUS
A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below. The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration. To fix this, a check for allowed file extensions was added before downloading files to a tmp directory
auch bekannt als (3)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (7)
Externe Belege — Patches, Meldungen, Analysen.
- https://documentation.concretecms.org/developers/introduction/version-history/857-release-notescnnvd
- https://hackerone.com/reports/1350444cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-22968cnnvd
- https://documentation.concretecms.org/developers/introduction/version-history/857-release-notesenisa_euvd
- https://hackerone.com/reports/1350444enisa_euvd
- https://documentation.concretecms.org/developers/introduction/version-history/857-release-notesRelease NotesVendor Advisorynvd
- https://hackerone.com/reports/1350444ExploitThird Party Advisorynvd
Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.
Kostenloser Scan