EUVD-2026-61093
GHSA-jm2p-2r65-7m5c
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable restore API requires low-privileged authentication; unvalidated path traversal enables arbitrary filesystem write yielding full C/I/A impact on the vulnerable system.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
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
AnalysisAI
Remote code execution in Halo 2.25.4 is reachable by low-privileged authenticated attackers through the backup restoration workflow, exploiting CWE-73 (External Control of File Name or Path) in MigrationServiceImpl.restoreWorkdir() combined with Spring's FileSystemUtils.copyRecursively(). An attacker with a valid low-privileged account can supply a crafted backup archive containing path-traversal entries that escape the designated work directory, writing arbitrary files to the server filesystem and achieving code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privileged authenticated session - the CVSS vector PR:L confirms that some level of authentication is necessary; unauthenticated exploitation is not supported by available data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 8.8 (High) with vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately reflects a network-reachable, low-complexity attack requiring only a low-privileged account, with full confidentiality, integrity, and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | An upstream fix is available via GitHub PR #4206 (https://github.com/halo-dev/halo/pull/4206), which replaces the unchecked Spring FileSystemUtils.copyRecursively() invocation with a path-validated custom implementation; however, a tagged release version incorporating this fix has not been independently confirmed at time of analysis - this is an upstream fix available via PR/commit, not a confirmed shipped release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Halo 2.25.4 deployments and immediately restrict access to the backup restoration workflow to trusted administrators only, using network access controls or application-level role restrictions. …
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Same weakness CWE-73 – External Control of File Name or Path
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External POC / Exploit Code
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