Is CVE-2025-53633 actively exploited?

No active exploitation of CVE-2025-53633 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-53633 be exploited remotely?

Yes. CVE-2025-53633 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-53633?

CVE-2025-53633 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2025-53633

CRITICAL

CVE-2025-53633

CWE-405Published: July 10, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. When decoding a scenario (i.e. a zip archive), the size of the decoded content is not checked, potentially leading to zip bombs decompression. Exploitation does not require authentication nor authorization, so anyone can exploit it. It should nonetheless not be exploitable as it is highly recommended to bury Chall-Manager deep within the infrastructure due to its large capabilities, so no users could reach the system. Patch has been implemented by commit 14042aa and shipped in v0.1.4.

NVD Source

Technical Analysis

CVE-2025-53633 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.