{"vulnerability": "cve-2021-25735", "sightings": [{"uuid": "56f74c2e-716d-455c-b4dc-a8820b68f632", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/k8security/265", "content": "CVE-2021-25735: Validating Admission Webhook does not observe some previous fields\n\n\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043a\u0440\u0438\u0442\u0438\u0447\u043d\u043e\u0441\u0442\u0438 Medium (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H)\n\n\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 kube-apiserver \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 Node \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u043e\u0431\u043e\u0439\u0442\u0438 Validating Admission Webhook\n\n\u041f\u043e\u0434 \u0432\u043b\u0438\u044f\u043d\u0438\u0435\u043c \u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0435 validating admission plugins, \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0439 NodeRestriction \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u0430\u043a \u043f\u043e\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f.", "creation_timestamp": "2021-04-15T05:41:02.000000Z"}, {"uuid": "04137799-c799-45e0-a2d4-6030497716ee", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/cibsecurity/28290", "content": "\u203c CVE-2021-25735 \u203c\n\nA security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-09-06T16:40:34.000000Z"}, {"uuid": "09ccc5f2-ba3d-493e-b2ec-2e0fb0af4297", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/pwnwiki_zhchannel/490", "content": "CVE-2021-25735 Kubernetes \u51c6\u5165\u6a5f\u5236\u7e5e\u904e\u6f0f\u6d1e\nhttps://www.pwnwiki.org/index.php?title=CVE-2021-25735_Kubernetes_%E5%87%86%E5%85%A5%E6%A9%9F%E5%88%B6%E7%B9%9E%E9%81%8E%E6%BC%8F%E6%B4%9E", "creation_timestamp": "2021-05-22T02:30:17.000000Z"}, {"uuid": "e79acdc1-7497-4bc7-9776-9ac69e3bb4e1", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3203", "content": "#exploit\nCVE-2021-25735: \nKubernetes Validating Admission Webhook Bypass (PoC)\nhttps://github.com/darryk10/CVE-2021-25735", "creation_timestamp": "2021-04-27T05:17:14.000000Z"}, {"uuid": "ecef930c-f7de-47a7-8171-e75f9f73e0d3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/reverseame/1135", "content": "", "creation_timestamp": "2026-07-29T12:02:58.166890Z"}, {"uuid": "5a0b4a5c-ba0b-4539-8302-48c7ae4e7829", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "Telegram/OPIzi23cqX-aSYK9BVJh_UtQ5IHKDr9vxlUtGOjd5OHMDUw", "content": "", "creation_timestamp": "2026-07-29T12:01:08.908664Z"}, {"uuid": "477f6b07-87b8-42c3-a257-6261e3267e87", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/reverseame/1135", "content": "", "creation_timestamp": "2026-07-30T00:02:47.829348Z"}, {"uuid": "dd02a2d2-8a5c-46b6-910f-7f8f896110f0", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "Telegram/OPIzi23cqX-aSYK9BVJh_UtQ5IHKDr9vxlUtGOjd5OHMDUw", "content": "", "creation_timestamp": "2026-07-30T00:01:47.922024Z"}, {"uuid": "7272c5d2-548c-4e63-99d1-652420010da4", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "Telegram/OPIzi23cqX-aSYK9BVJh_UtQ5IHKDr9vxlUtGOjd5OHMDUw", "content": "", "creation_timestamp": "2026-08-01T09:00:05.666763Z"}, {"uuid": "ee4253a8-5123-4199-8e41-415340a27495", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "Telegram/OPIzi23cqX-aSYK9BVJh_UtQ5IHKDr9vxlUtGOjd5OHMDUw", "content": "", "creation_timestamp": "2026-08-02T00:01:09.213679Z"}, {"uuid": "662972a9-b522-4c15-8127-dfbb7dbc81ef", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "https://t.me/reverseame/1135", "content": "", "creation_timestamp": "2026-08-03T10:06:00.302978Z"}, {"uuid": "b4244048-0c70-4157-9ea6-f3f827a12dde", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "https://t.me/reverseame/1135", "content": "", "creation_timestamp": "2026-08-04T00:00:42.435583Z"}, {"uuid": "4165de14-adcb-40f6-9a2b-5d7bf0630ae4", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "published-proof-of-concept", "source": "https://t.me/cissp/3023", "content": "", "creation_timestamp": "2026-09-11T08:00:07.056465Z"}, {"uuid": "dc17cfbe-9b25-48fb-bf2e-e5ac7a81cc2f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "4f29edb9-4c4b-44ca-b041-9b050656b6ae", "vulnerability": "CVE-2021-25735", "type": "seen", "source": "https://t.me/cissp/3023", "content": "", "creation_timestamp": "2026-09-01T17:00:52.893215Z"}]}