VYPR
← All advisories
Medium severity5.3NVD Advisory· Published May 21, 2026· Updated May 26, 2026

CVE-2026-8239

CVE-2026-8239

Description

Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/get_rating' endpoint confirms existence and returns rating score for any message by ID. 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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
concrete5/concrete5Packagist
< 9.5.19.5.1

Affected products

2
  • Concrete5/Concrete5inferred2 versions
    <=9.5.0+ 1 more
    • (no CPE)range: <=9.5.0
    • (no CPE)range: <=9.5.0

Patches

Vulnerability mechanics

References

3

News mentions

1