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TI-2026-19733 Aliases CVE-2026-24479

HUSTOJ has Arbitrary File Write (Zip Slip) in Problem Import Modules that leads to RCE

Priority MEDIUM 59CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.08133 94th percentileScored 2026-11-07
Fix Fixed hustoj (zhblue): 26.01.24

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zhbluehustojbefore 26.01.2426.01.24Patch availableCNA
  • hustoj Vendorzhblue Affected before 26.01.24 Fixed in 26.01.24 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:hustoj:hustoj:*:*:*:*:*:*:*:*before 26.01.24VulnerableHustoj
  • cpe:2.3:a:hustoj:hustoj:*:*:*:*:*:*:*:* Versions before 26.01.24 Vulnerable ·Hustoj

Remediation

  • Fix · CNA hustoj (zhblue) Fixed in 26.01.24

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-24479

References

Patch 1

Advisory 1

  • TI-2025-32272 Cross site scripting (XSS) vulnerability in Hustoj 2025-01-31 via the TID parameter to thread.php. CVSS 3.1MEDIUM 6.1
  • TI-2022-20442 Hustoj 22.09.22 has a XSS Vulnerability in /admin/problem_judge.php. CVSS 3.1MEDIUM 6.1
  • TI-2026-19231 HUSTOJ is Vulnerable to Stored CSV Injection (Formula Injection) in Contest Rank Export CVSS 4.0MEDIUM 5.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences