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CVE-2024-56156

Halo remote code execution

9.0 CRITICALPublic exploitEPSS 0.81%
  1. Published25 Apr 2025

Description

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Halo< 2.20.13

Remediation

Fixed in
Halo≥ 2.20.13

References

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Frequently asked

Is CVE-2024-56156 being actively exploited?

CVE-2024-56156 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.81%.

How severe is CVE-2024-56156?

CVE-2024-56156 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.81% probability of exploitation.

Which products are affected by CVE-2024-56156?

Affected products include Halo.

How do I fix CVE-2024-56156?

Upgrade affected software to a fixed version, for example Halo 2.20.13 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-56156 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.