High
Security advisory
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-25742
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:41 UTC · Revision 1
Source evidence
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.
osv:CVE-2021-25742
Complete source record
{
"id": "d562b68de145b601c309e1c591032dde2854490cf9f13f85337a7f929c4ba561",
"url": "https://osv.dev/vulnerability/CVE-2021-25742",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-25742",
"summary": "A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.",
"evidence": "osv:CVE-2021-25742",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-25742",
"aliases": [
"CVE-2021-25742"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/kubernetes/ingress-nginx",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "29b55195045d399960f474e4f8e41095d37ff69b"
},
{
"introduced": "f207702c3080d679ae86307eafbc16b0d3098e6c"
},
{
"last_affected": "f207702c3080d679ae86307eafbc16b0d3098e6c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "0.49.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:kubernetes:ingress-nginx:1.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.0.0"
},
{
"last_affected": "1.0.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"1.0.0",
"helm-chart-4.0.1",
"controller-v1.0.0",
"helm-chart-3.36.0",
"controller-v0.49.0",
"helm-chart-3.35.0",
"controller-v0.48.1",
"helm-chart-3.34.0",
"controller-v0.47.0",
"helm-chart-3.33.0",
"helm-chart-3.32.0",
"helm-chart-3.31.0",
"helm-chart-3.30.0",
"controller-v0.46.0",
"helm-chart-3.29.0",
"helm-chart-3.28.0",
"controller-v0.45.0",
"helm-chart-3.27.0",
"helm-chart-3.26.0",
"helm-chart-3.24.0",
"helm-chart-3.25.0",
"controller-v0.44.0",
"helm-chart-3.23.0",
"helm-chart-3.22.0",
"helm-chart-3.21.0",
"helm-chart-3.20.1",
"helm-chart-3.20.0",
"controller-v0.42.0",
"controller-v0.43.0",
"helm-chart-3.19.0",
"helm-chart-3.18.0",
"helm-chart-3.17.0",
"helm-chart-3.16.1",
"helm-chart-3.16.0",
"ingress-nginx-3.15.2",
"ingress-nginx-3.15.1",
"ingress-nginx-3.15.0",
"ingress-nginx-3.13.0",
"ingress-nginx-3.12.0",
"ingress-nginx-3.11.1",
"ingress-nginx-3.11.0",
"controller-v0.41.2",
"ingress-nginx-3.10.1",
"controller-v0.41.1",
"ingress-nginx-3.10.0",
"ingress-nginx-3.9.0",
"ingress-nginx-3.8.0",
"controller-v0.41.0",
"ingress-nginx-3.7.1",
"ingress-nginx-3.4.1",
"ingress-nginx-3.7.0",
"ingress-nginx-3.6.0",
"ingress-nginx-3.5.1",
"ingress-nginx-3.5.0",
"controller-v0.40.2",
"ingress-nginx-3.4.0",
"controller-v0.40.1",
"ingress-nginx-3.3.1",
"controller-v0.40.0",
"ingress-nginx-3.3.0",
"ingress-nginx-3.2.0",
"ingress-nginx-3.1.0",
"ingress-nginx-3.0.0",
"ingress-nginx-2.16.0",
"ingress-nginx-2.15.0",
"ingress-nginx-2.14.0",
"ingress-nginx-2.13.0",
"controller-v0.35.0",
"ingress-nginx-2.12.1",
"ingress-nginx-2.12.0",
"ingress-nginx-2.11.3",
"ingress-nginx-2.11.2",
"controller-v0.34.1",
"ingress-nginx-2.11.1",
"ingress-nginx-2.11.0",
"controller-v0.34.0",
"ingress-nginx-2.10.0",
"ingress-nginx-2.9.1",
"ingress-nginx-2.9.0",
"ingress-nginx-2.8.0",
"ingress-nginx-2.7.1",
"ingress-nginx-2.7.0",
"ingress-nginx-2.6.0",
"ingress-nginx-2.5.0",
"ingress-nginx-2.4.0",
"ingress-nginx-2.0.3",
"ingress-nginx-2.3.0",
"ingress-nginx-2.2.0",
"ingress-nginx-2.1.0",
"ingress-nginx-2.0.2",
"ingress-nginx-2.0.1",
"ingress-nginx-2.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-25742.json"
}
}
],
"modified": "2026-10-20T10:54:33.753521921Z",
"provider": "osv",
"references": [
"https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQY",
"https://security.netapp.com/advisory/ntap-20211203-0001/",
"https://github.com/kubernetes/ingress-nginx/issues/7837"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-25742",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385584,
"published_at": "2021-10-29T04:15:08.22+00:00"
}