CVE-2026-7881: Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block
Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference (IDOR) in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Madani for reporting.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-7881?
The severity of CVE-2026-7881 is rated as medium with a CVSS score of 6.3.
How do I fix CVE-2026-7881?
To fix CVE-2026-7881, upgrade Concrete CMS to version 9.5.1 or above.
What type of vulnerability is CVE-2026-7881?
CVE-2026-7881 is classified as an Insecure Direct Object Reference (IDOR) vulnerability.
What is the impact of CVE-2026-7881?
The impact of CVE-2026-7881 is unauthorized access to all Express form submissions.
Which software versions are affected by CVE-2026-7881?
CVE-2026-7881 affects Concrete CMS versions 9.5.0 and below.