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TI-2024-37139 Aliases CVE-2024-56156

Halo Vulnerable to Stored XSS and RCE via File Upload Bypass

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00827 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed halo (halo-dev): 2.20.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
halo-devhalobefore 2.20.132.20.13Patch availableCNA
  • halo Vendorhalo-dev Affected before 2.20.13 Fixed in 2.20.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:halo:halo:*:*:*:*:*:*:*:*before 2.20.13Vulnerablehalo-dev
  • cpe:2.3:a:halo:halo:*:*:*:*:*:*:*:* Versions before 2.20.13 Vulnerable ·halo-dev

Remediation

  • Fix · CNA halo (halo-dev) Fixed in 2.20.13

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-56156

References

Exploit 1

Other 2

  • TI-2025-28627 halo v2.20.17 and before is vulnerable to server-side request forgery (SSRF) in… CVSS 3.1CRITICAL 9.1
  • TI-2025-43155 An issue in halo v.2.22.4 and before allows a remote attacker to cause a denial of… CVSS 3.1HIGH 7.5
  • TI-2024-29387 Halo's editor has a stored XSS vulnerability CVSS 3.1MEDIUM 6.4
  • TI-2024-29386 Halo's editor has a stored Cross-Site Scripting vulnerability CVSS 3.1MEDIUM 6.3
  • TI-2022-14503 Halo CMS v1.5.3 was discovered to contain an arbitrary file upload vulnerability via the… CVSS 3.1CRITICAL 9.8
  • TI-2022-14504 Halo CMS v1.5.3 was discovered to contain a Server-Side Request Forgery (SSRF) via the… CVSS 3.1CRITICAL 9.8
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences