CVE-2026-7881 | THREATINT

Description

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-05-21 | Updated 2026-05-22 | Assigner ConcreteCMS

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-639 Authorization bypass through User-Controlled key

Product status

Default status

unaffected

5.0 (git) before 9.5.0

affected

Credits

Tristan Madani finder

References

documentation.concretecms.org/...n-history/951-release-notes release-notes

cve.org (CVE-2026-7881)

nvd.nist.gov (CVE-2026-7881)

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