EUVD-2026-70481
GHSA-c94f-pm78-6rh7
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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 API, low complexity, requires authentication (PR:L); integrity impact is limited to message metadata; soft-deletion does not constitute meaningful availability loss.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
CRMEB through 6.0.0 fails to validate message ownership in the edit_message handler of MessageSystemController.php, allowing authenticated users to modify arbitrary system inbox messages. Attackers can update any message's columns including is_del, look, and uid to delete, mark read, or reassign victim notifications without authorization.
AnalysisAI
Insecure Direct Object Reference (IDOR) in CRMEB through 6.0.0 allows any authenticated user to modify arbitrary system inbox messages belonging to other users via the edit_message endpoint in MessageSystemController.php. The handler accepts user-controlled message IDs without validating that the requesting user owns the targeted message, enabling silent manipulation of victim notifications - including soft-deletion (is_del), marking as read (look), or reassigning ownership (uid). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated user account on the CRMEB instance (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.3 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L) accurately reflects the constrained scope: exploitation requires a valid account (PR:L), and the impact is limited to integrity and minor availability disruption against messaging data - no confidentiality breach is achieved and no broader system compromise is possible through this vector alone. … 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 | No vendor-released patch has been identified at time of analysis; the vulnerability was reported via GitHub issue #120 (https://github.com/crmeb/CRMEB/issues/120) and no corresponding fix commit or tagged release has been confirmed. … Detailed patch versions, workarounds, and compensating controls in full report. |
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