EUVD-2026-31358
GHSA-vpgr-cwfx-pwfw
CVSS VectorNVD
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/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
Lifecycle Timeline
1DescriptionNVD
Concrete CMS 9.5.0 and below is vulnerable to unauthenticated page metadata disclosure across every page with a configured summary template, revealing the existence of private, draft, and restricted pages while leaking title, path, description, and author information. 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 Winston Crooker for reporting.
AnalysisAI
Unauthenticated page metadata disclosure in Concrete CMS 9.5.0 and below exposes private, draft, and restricted page details - including title, URL path, description, and author - to any remote attacker on sites with summary templates configured. The flaw stems from improper access control (CWE-284) where the summary template rendering pipeline bypasses page visibility restrictions entirely, making sensitive page structure visible without any credential. …
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External POC / Exploit Code
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