CVE-2024-56156

Halo is an open source website building tool. Prior to version 2.20.13, a vulnerability in Halo allows attackers to bypass file type validation controls. This bypass enables the upload of malicious files including executables and HTML files, which can lead to stored cross-site scripting attacks and potential remote code execution under certain circumstances. This issue has been patched in version 2.20.13.

CVSS v3 9.0 CRITICAL

9.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/halo-dev/halo/commit/24f8d7b57127e2607ec05adb7c912b3decddeb99
https://github.com/halo-dev/halo/pull/7149	Issue Tracking
https://github.com/halo-dev/halo/security/advisories/GHSA-99mc-ch53-pqh9	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:halo:halo:*:*:*:*:*:*:*:*

History

03 Feb 2026, 19:16

Type	Values Removed	Values Added
References		() https://github.com/halo-dev/halo/commit/24f8d7b57127e2607ec05adb7c912b3decddeb99 -

Information

Published : 2025-04-25 16:15

Updated : 2026-02-03 19:16

NVD link : CVE-2024-56156

Mitre link : CVE-2024-56156

CVE.ORG link : CVE-2024-56156

JSON object : View

Products Affected

halo

halo

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2024-56156", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.5, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:P/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", "exploitMaturity": "PROOF_OF_CONCEPT", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-04-25T16:15:25.597", "references": [{"url": "https://github.com/halo-dev/halo/commit/24f8d7b57127e2607ec05adb7c912b3decddeb99", "source": "security-advisories@github.com"}, {"url": "https://github.com/halo-dev/halo/pull/7149", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/halo-dev/halo/security/advisories/GHSA-99mc-ch53-pqh9", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Halo is an open source website building tool. Prior to version 2.20.13, a vulnerability in Halo allows attackers to bypass file type validation controls. This bypass enables the upload of malicious files including executables and HTML files, which can lead to stored cross-site scripting attacks and potential remote code execution under certain circumstances. This issue has been patched in version 2.20.13."}, {"lang": "es", "value": "Halo es una herramienta de c\u00f3digo abierto para crear sitios web. Antes de la versi\u00f3n 2.20.13, una vulnerabilidad en Halo permit\u00eda a los atacantes eludir los controles de validaci\u00f3n de tipos de archivo. Esta evasi\u00f3n permite la carga de archivos maliciosos, incluyendo ejecutables y archivos HTML, lo que puede provocar ataques de cross-site scripting almacenado y la posible ejecuci\u00f3n remota de c\u00f3digo en determinadas circunstancias. Este problema se ha corregido en la versi\u00f3n 2.20.13."}], "lastModified": "2026-02-03T19:16:10.857", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:halo:halo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CE02782-7C8A-45F4-91E4-10BB904EA96A", "versionEndExcluding": "2.20.13"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}