MISP contains an access control flaw in the EventReports functionality. The replaceSuggestionInReport action, which allows modification of suggestion content within an event report, was incorrectly mapped to the wildcard permission ('*') in the ACLComponent, making it accessible to any authenticated user regardless of their assigned permissions. All analogous report-modification actions correctly required the perm_add permission, while read-only actions such as downloadAsPDF appropriately used the wildcard.
An authenticated user without the perm_add permission could invoke the replaceSuggestionInReport endpoint to alter report suggestion data, violating the intended authorization model.
This constitutes an improper authorization weakness that could lead to unauthorized modification of event report content, potentially corrupting shared threat intelligence data or injecting misleading information into reports relied upon by other analysts and automated consumers.
"}],"value":"MISP contains an access control flaw in the EventReports functionality. The replaceSuggestionInReport action, which allows modification of suggestion content within an event report, was incorrectly mapped to the wildcard permission ('*') in the ACLComponent, making it accessible to any authenticated user regardless of their assigned permissions. All analogous report-modification actions correctly required the perm_add permission, while read-only actions such as downloadAsPDF appropriately used the wildcard. \n\nAn authenticated user without the perm_add permission could invoke the replaceSuggestionInReport endpoint to alter report suggestion data, violating the intended authorization model. \n\nThis constitutes an improper authorization weakness that could lead to unauthorized modification of event report content, potentially corrupting shared threat intelligence data or injecting misleading information into reports relied upon by other analysts and automated consumers."}],"impacts":[{"capecId":"CAPEC-126","descriptions":[{"lang":"en","value":"CAPEC-126 Forced Browsing"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","description":"CWE-862 Missing Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-22T14:13:26.670Z","orgId":"5a6e4751-2f3f-4070-9419-94fb35b644e8","shortName":"CIRCL"},"references":[{"name":"Security patch","tags":["patch"],"url":"https://github.com/MISP/MISP/commit/66aebfb1a"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The ACL mapping for the replaceSuggestionInReport action was corrected from the wildcard permission ('*') to the perm_add permission, aligning it with all other report-modification actions and ensuring that only users explicitly granted the add permission can invoke the action.
"}],"value":"The ACL mapping for the replaceSuggestionInReport action was corrected from the wildcard permission ('*') to the perm_add permission, aligning it with all other report-modification actions and ensuring that only users explicitly granted the add permission can invoke the action."}],"title":"MISP Missing Authorization on replaceSuggestionInReport Event Report Action","x_gcve":[{"extensions":{"bcp-05-x-01":{"ai_annotations":[{"ai_level":"generated","description":"Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.","gna_source":1,"models":[{"gna_source":1,"identifier":"qwen3.8:27b","name":"qwen3.8:27b","source":"ollama"}],"review_status":"full","scope":"record","tags":["ai-computer-assisted:llm-generated","ai-computer-assisted:classification"]}]},"bcp-05-x-02":{"x_patch2vuln":{"assumptions":["The affected version range is inferred from the tag boundary (v2.5.47, 136 commits after fix); the exact last vulnerable version is not explicitly stated in the patch metadata.","The CVSS VI:H rating assumes that modifying report suggestions constitutes a significant integrity impact on the MISP instance's threat intelligence data; if the practical impact is considered lower, VI:M may be more appropriate.","The CAPEC-126 mapping is the closest available pattern; the exact exploitation vector (REST API call vs. web form submission) is not specified in the patch, but the core mechanism of unauthorized action invocation is consistent.","The patch does not include the full ACLComponent context, so the exact set of users affected (e.g., whether 'perm_add' is a common or rare permission in typical MISP deployments) is not fully determinable.","No authentication bypass is implied; the attacker must already be an authenticated MISP user."],"capecRationale":[{"capecId":"CAPEC-126","rationale":"The attacker invokes the replaceSuggestionInReport endpoint directly (e.g., via API or URL manipulation) relying on the fact that the ACL layer permits the action for all authenticated users. The attack pattern of accessing a resource or action the user is not authorized to perform by directly requesting it matches Forced Browsing. Uncertainty: the exact request vector (REST API vs. web UI) is not specified in the patch, but the underlying mechanism of bypassing intended authorization by directly calling the endpoint is consistent with this pattern."}],"commit":"66aebfb1a1e58a82b3a681367347f69c46c38ee5","confidence":"medium","credits":[{"lang":"en","type":"reporter","value":"Jeroen Pinoy"},{"lang":"en","type":"remediation developer","value":"iglocska"}],"cvssRationale":"The vulnerability is exploitable over the network (AV:N) via a simple HTTP request to the MISP API or web interface (AC:L). No attack target manipulation is required (AT:N). The attacker must be an authenticated user with at least basic access but without perm_add (PR:L). No user interaction is needed (UI:N). The primary impact is on the integrity of the vulnerable system's event report data (VI:H), as an unauthorized user can modify report suggestions. Confidentiality and availability impacts are not directly evidenced (VC:N, VA:N). No secondary system impact is indicated (SC:N, SI:N, SA:N).","fixSummary":"The ACL mapping for the replaceSuggestionInReport action was corrected from the wildcard permission ('*') to the perm_add permission, aligning it with all other report-modification actions and ensuring that only users explicitly granted the add permission can invoke the action.","generatedAt":"2026-09-22T14:08:14.968747Z","generator":"patch2vuln.py","model":"qwen3.8:27b","modelComparison":{"rankings":[{"agreementScore":9,"assumptionCount":5,"confidence":"medium","model":"qwen3.8:27b","score":5}],"selectedModel":"qwen3.8:27b","selectionMethod":"deterministic-consensus-v1","selectionNotice":"The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."},"patchSha256":"4dbeb3f23f82f36cfdc980039b1d19717eea20a3f4d4caf25a3f0a3f72523c83","patchSummary":"In app/Controller/Component/ACLComponent.php, a single-line change was made in the event reports ACL array: the permission requirement for the 'replaceSuggestionInReport' key was changed from array('*') to array('perm_add'), restricting the action to users with the perm_add privilege.","patchTruncated":false,"patches":[{"commit":"66aebfb1a1e58a82b3a681367347f69c46c38ee5","patchSha256":"4dbeb3f23f82f36cfdc980039b1d19717eea20a3f4d4caf25a3f0a3f72523c83","source":"https://github.com/MISP/MISP/commit/66aebfb1a.patch","sourceUrl":"https://github.com/MISP/MISP/commit/66aebfb1a.patch","subject":"fix: [ACL] tightening of eventreports"}],"source":"https://github.com/MISP/MISP/commit/66aebfb1a.patch","subject":"fix: [ACL] tightening of eventreports","tagVersionBoundary":{"commits_after_fix":136,"repository":"https://github.com/MISP/MISP","tag":"v2.5.47","version":"2.5.47","version_type":"semver"},"weaknessRationale":[{"cweId":"CWE-862","rationale":"The replaceSuggestionInReport action was accessible to all authenticated users (wildcard '*') when it should have required the perm_add permission. The authorization check was effectively missing for this specific action, allowing any authenticated user to perform a privileged operation."}]}}},"recordType":"advisory","vulnId":"GCVE-1-2026-20095"}]}},"cveMetadata":{"assignerOrgId":"5a6e4751-2f3f-4070-9419-94fb35b644e8","assignerShortName":"CIRCL","cveId":"CVE-2026-95685","datePublished":"2026-09-22T14:13:26.670Z","dateReserved":"2026-09-22T14:13:20.760Z","dateUpdated":"2026-09-22T15:13:38.313Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-22 15:17:26","lastModifiedDate":"2026-09-22 16:18:23","problem_types":["CWE-862","CWE-862 CWE-862 Missing Authorization"],"metrics":{"cvssMetricV40":[{"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-22T15:13:31.472359Z","id":"CVE-2026-95685","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"95685","Ordinal":"1","Title":"MISP Missing Authorization on replaceSuggestionInReport Event Re","CVE":"CVE-2026-95685","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"95685","Ordinal":"1","NoteData":"MISP contains an access control flaw in the EventReports functionality. The replaceSuggestionInReport action, which allows modification of suggestion content within an event report, was incorrectly mapped to the wildcard permission ('*') in the ACLComponent, making it accessible to any authenticated user regardless of their assigned permissions. All analogous report-modification actions correctly required the perm_add permission, while read-only actions such as downloadAsPDF appropriately used the wildcard. \n\nAn authenticated user without the perm_add permission could invoke the replaceSuggestionInReport endpoint to alter report suggestion data, violating the intended authorization model. \n\nThis constitutes an improper authorization weakness that could lead to unauthorized modification of event report content, potentially corrupting shared threat intelligence data or injecting misleading information into reports relied upon by other analysts and automated consumers.","Type":"Description","Title":"MISP Missing Authorization on replaceSuggestionInReport Event Re"}]}}}