UpHeron
All vulnerabilities

Servers and applications

CVE-2021-22968

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…

Severity
High 7.2
Published
19 Nov 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.5.7
Sources
NVD

Affected software

SoftwareAffected versions
Concrete CMSServers and applications · cpe:a:concretecms:concrete_cms
  • Every version before 8.5.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22968
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22968