EUVD-2026-72137
GHSA-p286-r3vc-q86q
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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
Network-accessible by any authenticated low-privilege user; no integrity or availability impact; pure confidentiality bypass with no scope change.
Primary rating from Vendor (CIRCL).
CVSS VectorVendor: CIRCL
Lifecycle Timeline
4DescriptionCVE.org
MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.
AnalysisAI
Authorization bypass in MISP's UiBeta theme collection view exposes full event details - including identifiers, info fields, timestamps, creator organization, all event tags, and galaxy clusters - to authenticated users who lack ACL permissions to those events. The UiBeta theme's view.ctp template performed an independent secondary database query using only Event.uuid IN (...) without invoking createEventConditions(), the canonical per-user ACL enforcement method, even though CollectionsController::view() correctly filtered events via Event::fetchSimpleEvents($user, ...). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated MISP user account (PR:L) with either write access to a collection (to add arbitrary event UUIDs as elements) or view access to a collection that already contains references to events outside their ACL. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N scores 7.1, reflecting network-accessible, low-complexity exploitation by any authenticated user. … 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 | Apply the upstream patch from commit 44573e4a8 (https://github.com/MISP/MISP/commit/44573e4a8.patch), which corrects `view.ctp` to pass `createEventConditions($_me)` into the secondary event query and passes `$_me` correctly to `attachClustersToEventIndex()`. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all MISP instances using the UiBeta theme and audit existing collection membership to detect unauthorized event references. …
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Same weakness CWE-862 – Missing Authorization
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
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