CVE-2026-78971
MediumCVSS 4.6Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
In Halo <= 2.25.4, the plugin management feature allows users to install/update malicious plugins, which could let attackers execute any command with Halo process permissions.
Risk Assessment
An attacker can take control of the Halo server by executing arbitrary commands, potentially leading to data integrity and confidentiality breaches.
Recommendation
Restrict access to the plugin management feature to trusted administrators and regularly update Halo to the latest version.
Other vulnerabilities in Halo
See all- CVE-2026-97182High
A security vulnerability has been detected in halo-dev Halo up to 2.25.4/2.26.1. Affected is an unknown function of the file application/src/main/java/run/halo/app/content/comment/ReplyNotificationSubscriptionHelper.java of the SpEL Handler component. Such manipulation leads to improper neutralization.
- CVE-2026-67919Critical
An issue in Halo 2.25.4 allows a remote attacker to execute arbitrary code via the PluginEndpoint.java, installFromUri method, and DefaultPluginApplicationContextFactory components.
- CVE-2026-91772Medium
Halo through 2.26.1 contains an open redirect vulnerability in the anonymous thumbnail endpoint that fails to validate the uri query parameter. Attackers can craft malicious links on the trusted Halo domain that redirect visitors to arbitrary external sites, enabling phishing attacks and abuse of redirect-based trust relationships.
- CVE-2026-67920High
An issue in Halo 2.25.4 allows a remote attacker to execute arbitrary code via the run.halo.app.migration.impl.MigrationServiceImpl.restoreWorkdir(), and org.springframework.util.FileSystemUtils.copyRecursively() components.
- CVE-2026-15326Low
A path traversal vulnerability was found in halo-dev halo up to version 2.24.2 in the ThemeUtils.unzipThemeTo function of ThemeUtils.java during theme installation. Manipulating the metadata.name argument allows remote exploitation, and a public exploit is available.
- CVE-2026-55439Medium
Halo is an open source website building tool. Prior to version 2.24.3, a path traversal vulnerability in the backup download endpoint allows authenticated administrators to read arbitrary files from the server filesystem.
- CVE-2025-51857Medium
An XSS vulnerability in the reconcile method of the AttachmentReconciler class in Halo system v.2.20.18LTS and earlier allows an attacker to inject malicious scripts.
- CVE-2023-27164Medium
An arbitrary file upload vulnerability in Halo up to v1.6.1 allows attackers to execute arbitrary code via a crafted .md file.
Original NVD description (English source)
In Halo <= 2.25.4, the plugin management feature allows users to install/update malicious plugins, which could let attackers execute any command with Halo process permissions.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS