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