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CVE-2026-24479— HUSTOJ has Arbitrary File Write (Zip Slip) in Problem Import Modules that leads to RCE

Quick assessment

Affected
zhblue hustoj
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HUSTOJ是中国张浩斌（zhblue）个人开发者的一个流行的 OJ 系统。 HUSTOJ 26.01.24之前版本存在路径遍历漏洞，该漏洞源于problem_import_qduoj.php和problem_import_hoj.php模块未正确清理上传ZIP存档中的文件名，可能导致远程代码执行。

AI Predicted 9.8 Difficulty: Easy EPSS 8.32% · P95

Public Exploits 2

ExploitDB · 1 EDB-52539 [webapps]
Metasploit · 1 hustoj_problem_import_rce.rb [exploit]

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2026-24479

Vulnerability Information
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Vulnerability Title
HUSTOJ has Arbitrary File Write (Zip Slip) in Problem Import Modules that leads to RCE
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
HUSTOJ 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HUSTOJ是中国张浩斌（zhblue）个人开发者的一个流行的 OJ 系统。 HUSTOJ 26.01.24之前版本存在路径遍历漏洞，该漏洞源于problem_import_qduoj.php和problem_import_hoj.php模块未正确清理上传ZIP存档中的文件名，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zhblue hustoj < 26.01.24 -

II. Public POCs for CVE-2026-24479

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III. Intelligence Information for CVE-2026-24479

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Vendor Advisories for CVE-2026-24479 (1)

IV. Related Vulnerabilities

Same product: hustoj
Same vendor: zhblue
Same weakness: CWE-22

V. Comments for CVE-2026-24479

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