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Chall-Manager's scenario decoding process does not check for zip bombs

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2025-53633
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 15:54 UTC · Revision 1

Source evidence

Chall-Manager's scenario decoding process does not check for zip bombs

core-osv · Original source

Published 10 Jul 2025, 19:38 UTC

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.

osv:CVE-2025-53633
Complete source record
{
  "id": "4627f8e6767d6717a221e3aa2cb4d07222bfc7c5c4298c226cc7ec38853ca840",
  "url": "https://osv.dev/vulnerability/CVE-2025-53633",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Chall-Manager's scenario decoding process does not check for zip bombs",
    "summary": "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.",
    "evidence": "osv:CVE-2025-53633",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-53633",
      "aliases": [
        "CVE-2025-53633",
        "GHSA-r7fm-3pqm-ww5w",
        "GO-2025-3810"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ctfer-io/chall-manager",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e391620684f2466b75fe708f2ea75806ca9e2f82"
                },
                {
                  "fixed": "14042aa66a577caee777e10fe09adcf2587d20dd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ctfer-io:chall-manager:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.1.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "14042aa66a577caee777e10fe09adcf2587d20dd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e391620684f2466b75fe708f2ea75806ca9e2f82"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.1.4"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.3",
            "sdk/v0.1.3",
            "v0.1.2",
            "sdk/v0.1.2",
            "v0.1.1",
            "sdk/v0.1.1",
            "v0.1.0",
            "sdk/v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-53633.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.346236549Z",
      "provider": "osv",
      "references": [
        "https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53633.json",
        "https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-r7fm-3pqm-ww5w",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-53633",
        "https://github.com/ctfer-io/chall-manager/commit/14042aa66a577caee777e10fe09adcf2587d20dd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-405"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53633.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-53633",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497041,
  "published_at": "2025-07-10T19:38:19.564+00:00"
}