Critical severity · published Apr 25, 2025
CVE-2024-56156
Halo Vulnerable to Stored XSS and RCE via File Upload Bypass
9.0
CVSS
0.8%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
halo · halo-dev
< 2.20.13 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-56156
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-56156
github.com
https://github.com/halo-dev/halo/commit/24f8d7b57127e2607ec05adb7c912b3decddeb99
Issue Tracking
https://github.com/halo-dev/halo/pull/7149
Exploit
https://github.com/halo-dev/halo/security/advisories/GHSA-99mc-ch53-pqh9
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