PHP
CVE-2026-24479
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
HUSTOF is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. Prior to version 26.01.24, the problem_import_qduoj.php and problem_import_hoj.php modules fail to properly sanitize filenames within uploaded ZIP archives. Attackers can craft a malicious ZIP file containing files with path traversal sequences (e.g., ../../shell.php). When extracted by the server, this allows writing files to arbitrary locations in the web root, leading to Remote Code Execution (RCE). Version 26.01.24 contains a fix for the issue.
AnalysisAI
HUSTOJ online judge has a path traversal vulnerability enabling arbitrary file access on the competition server.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions — remote unauthenticated exploitation against HUSTOF versions prior to 26.01.24 with problem import functionality enabled on publicly accessible endpoints. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.8 with patch. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker uses path traversal to read test cases, steal other participants' solutions, or access server configuration. |
| Remediation | Update HUSTOJ. Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Disable problem_import_qduoj.php and problem_import_hoj.php modules or restrict access to trusted administrators only. …
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