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    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.

    Published:Apr 25, 2025
    Last Modified:Feb 3, 2026
    EPS:Apr 25, 2025
    EPSS Score:0.00433
    CVSS Score:9

    Affected Products

    Vendor
    Halo
    Product
    Halo

    Exploits

    https://github.com/halo-dev/halo/security/advisories/GHSA-99mc-ch53-pqh9

    Related CVEs

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    CVE-2026-67921 (CVSS 9.3) — Cross-Site Request Forgery (CSRF) vulnerability exists in Halo CMS versions up to 2.25.4 via the CorsConfigure…
    CVE-2026-67919 (CVSS 9.8) — An issue in Halo 2.25.4 allows a remote attacker to execute arbitrary code via the PluginEndpoint.java, instal…
    CVE-2026-16088 (CVSS 2) — A vulnerability was detected in halo-dev halo up to 2.24.2. Affected by this vulnerability is the function Dow…
    CVE-2026-15326 (CVSS 2) — A vulnerability was identified in halo-dev halo up to 2.24.2. This affects the function ThemeUtils.unzipThemeT…
    CVE-2026-55439 (CVSS 5.5) — Halo is an open source website building tool. Prior to 2.24.3, a path traversal vulnerability in the backup do…
    CVE-2026-36756 (CVSS 5.4) — A Server-Side Request Forgery (SSRF) in the /plugins/-/install-from-uri endpoint of halo v2.22.14 allows authe…
    CVE-2026-36759 (CVSS 6.5) — A Server-Side Request Forgery (SSRF) in the /themes/{name}/upgrade-from-uri endpoint of halo v2.22.14 allows a…
    CVE-2026-36758 (CVSS 4.3) — A Server-Side Request Forgery (SSRF) in the /themes/-/install-from-uri endpoint of halo v2.22.14 allows authen…
    CVE-2026-36757 (CVSS 4.3) — A Server-Side Request Forgery (SSRF) in the /plugins/{name}/upgrade-from-uri endpoint of halo v2.22.14 allows …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High