EUVD-2026-72319
GHSA-hx7m-vxj3-9qmx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
Network-accessible endpoint requires authenticated low-privilege user; only partial confidentiality impact (correlation metadata), no integrity or availability effect.
Primary rating from Vendor (CIRCL).
CVSS VectorVendor: CIRCL
Lifecycle Timeline
3DescriptionCVE.org
Affected versions of MISP contain improper authorization checks in the freetext feed preview functionality. The preview performed correlation lookups against attributes from events without applying the requesting user's ACL, allowing restricted event correlations and associated event information to be exposed to users who could not otherwise access those events. The vulnerable queries were scoped only by attribute values and deletion status rather than MISP's event, organization, sharing-group, attribute, and object-level access controls.
The same preview functionality also returned cross-feed correlation information without properly restricting the feed list to feeds visible to the caller. This exposed metadata for feeds that were not marked lookup_visible; one affected response additionally included the configured feed URL even though that value was not required by the feature.
The fixes apply the caller's ACL to attribute correlation searches, remove feed URLs from correlation results, restrict cross-feed results according to feed visibility, and correct host-organization ID comparison so the authorization rules are applied consistently.
Version affected: ≤2.5.45
AnalysisAI
Unauthorized correlation data exposure in MISP ≤2.5.45 allows authenticated users with restricted access to observe event correlations, event metadata, and feed URLs that their ACL would normally block. The freetext feed preview endpoint invoked two raw database queries against the Attribute model filtered only by attribute value and deletion status, entirely bypassing MISP's multi-layered access controls covering event distribution, organization membership, sharing groups, and attribute- and object-level permissions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active authenticated MISP session with at least a standard user role that has access to the freetext feed preview API endpoint. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 5.3 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L) is consistent with an authenticated, network-accessible information-disclosure issue of limited scope. … 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 fixes by updating MISP to a release incorporating commits dedb4b297, 4b6916086, dc1a0f7c2, and 1fb622046 from the MISP GitHub repository (https://github.com/MISP/MISP). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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