EUVD-2026-76249
GHSA-jv42-fxrq-qxjp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable dashboard endpoint, high privileges required (authenticated dashboard user with Page Type edit role), integrity-only impact limited to Page Type configuration.
Primary rating from Vendor (ConcreteCMS).
CVSS VectorVendor: ConcreteCMS
Lifecycle Timeline
2DescriptionCVE.org
Concrete CMS below 9.5.3 does not perform an object-level authorization check when a Page Type was updated. The Types::submit() dashboard controller loaded and saved the Page Type identified by a user-supplied ptID without calling canEditPageType(), so a signed-in dashboard user permitted to edit one Page Type could modify the configuration of Page Types outside their assigned authorization boundary. The update_page_type token was validated but is action- and user-scoped rather than object-scoped, so it did not constrain which Page Type could be targeted. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 5.1 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Andrew Gonzalez for reporting.
AnalysisAI
Missing object-level authorization in Concrete CMS below 9.5.3 allows a signed-in dashboard user with limited Page Type editing rights to modify arbitrary Page Types outside their assigned permission boundary. The Types::submit() controller accepts a user-supplied ptID parameter and persists the targeted Page Type without invoking canEditPageType(), meaning the CSRF token validation - which is action- and user-scoped only - provides no object-level constraint. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be authenticated to the Concrete CMS dashboard and to hold at least some level of Page Type editing permission (a non-default, administrator-delegated role). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 4.0 score of 5.1 (PR:H, VI:L, no confidentiality or availability impact) accurately reflects the constrained real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Concrete CMS 9.5.3 or later, which introduces the missing canEditPageType() authorization check in the Types::submit() controller. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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