How severe is CVE-2025-53632?

CVE-2025-53632 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-53632 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53632?

CVE-2025-53632 affects Ctfer-io Chall-manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53632?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-53632 have an EU (EUVD) identifier?

Yes. CVE-2025-53632 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21069.

When was CVE-2025-53632 published?

CVE-2025-53632 was published on 2025-07-10 and last updated on 2026-06-17.

CVE-2025-53632

CVE-2025-53632 is a critical-severity vulnerability in Ctfer-io Chall-manager with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 8.8
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21069
Weakness: CWE-22
Affected product: Ctfer-io Chall-manager
Published: 2025-07-10
Last modified: 2026-06-17

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 path of the file to write is not checked, potentially leading to zip slips. 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 47d188f and shipped in v0.1.4.

Frequently asked questions

What is CVE-2025-53632?: 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 path of the file to write is not checked, potentially leading to zip slips. 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 47d188f and shipped in v0.1.4.
How severe is CVE-2025-53632?: CVE-2025-53632 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-53632 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53632?: CVE-2025-53632 affects Ctfer-io Chall-manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53632?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-53632 have an EU (EUVD) identifier?: Yes. CVE-2025-53632 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21069.
When was CVE-2025-53632 published?: CVE-2025-53632 was published on 2025-07-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ctfer-io:chall-manager:*:*:*:*:*:*:*:*

More vulnerabilities in Ctfer-io Chall-manager

CVE-2026-32768 — Critical (CVSS 9.9): Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. In versions prior to 0.6.5,…
CVE-2025-53633 — Critical (CVSS 9.8): Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. When decoding a scenario…
CVE-2025-53634 — High (CVSS 7.5): Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. The HTTP Gateway processes…

All CVEs affecting Ctfer-io Chall-manager →

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