Insecure Direct Object Reference Vulnerability in Concrete CMS by Concrete5
CVE-2026-7881

6.3MEDIUM

Key Information:

Vendor

Concrete Cms

Status
Concrete Cms
Vendor
CVE Published:
21 May 2026

What is CVE-2026-7881?

Concrete CMS versions 9.5.0 and earlier contain an Insecure Direct Object Reference (IDOR) vulnerability in the Express Entry Detail block through the exEntryID parameter. This vulnerability can potentially allow unauthorized users to access all submitted Express form entries, thereby compromising sensitive data. Site administrators are advised to implement security measures to prevent unauthorized access and ensure their systems are updated to secure versions.

Affected Version(s)

Concrete CMS 5.0 < 9.5.0

References

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

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tristan Madani
.