CVE-2026-24479 EXPLOIT
9.8
CRITICAL · CVSS 3.1 · EPSS 8.3% (pctl 95)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 8.32% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-22 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2026-01-27 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| hustoj | hustoj |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | HUSTOJ Zip-Slip v26.01.24 - RCE | 2026-04-30 |
References
→ the Explorer · watch your stack · NVD