Cross Site Request Forgery Vulnerability in Concrete CMS by Concrete
CVE-2026-8435

2.3LOW

Key Information:

Vendor

Concrete Cms

Status
Concrete Cms
Vendor
CVE Published:
21 May 2026

What is CVE-2026-8435?

Concrete CMS version 9 before 9.5.0 is susceptible to a Cross Site Request Forgery (CSRF) attack through the approveVersion() method in the backend file controller. This vulnerability can allow an attacker to perform unauthorized actions on behalf of an authenticated user, potentially compromising the security of the web application. Immediate updates are recommended to mitigate the risks associated with this vulnerability.

Affected Version(s)

Concrete CMS 9.0 <= 9.5.0

References

https://documentation.concretecms.org/9-x/developers/intr...
release-notes

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yonatan Drori (Tenzai)
.