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CVE-2024-56156

Halo Vulnerable to Stored XSS and RCE via File Upload Bypass

Published: Apr 25, 2025Updated: Feb 3, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
9.0CVSSCRITICAL
EPSS Score
0.6%
Top 54.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

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 Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-79

Affected Products

halohalo-dev
On-prem
Web & CMS Plugins / cms-core
halohalo
On-prem
Web & CMS Plugins / cms-core
halo-devoss-projectWeb & CMS Pluginsaka halo-dev, halo
halooss-projectWeb & CMS Plugins

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/halo-dev/halo/security/advisories/GHSA-99mc-ch53-pqh9
github.com
https://github.com/halo-dev/halo/pull/7149
github.com
https://github.com/halo-dev/halo/commit/24f8d7b57127e2607ec05adb7c912b3decddeb99
github.com

Timeline

Published
Apr 25, 2025
Last Updated
Feb 3, 2026

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