{"vulnerability": "cve-2021-21123", "sightings": [{"uuid": "dbfc2bfd-ec67-4d67-990c-473894d84403", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "seen", "source": "MISP/05c224a9-833f-4b2a-b6af-2b7010ba4b0f", "content": "", "creation_timestamp": "2024-11-14T06:08:21.000000Z"}, {"uuid": "bc6033f0-9a97-4e30-95d3-5b144032f3fe", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/cKure/4593", "content": "\u25a0\u25a0\u25a0\u25a0\u25a0 CVE-2021-21123\n\nhttps://youtu.be/Mr95IeGiTj0\n\nhttps://www.rapid7.com/db/vulnerabilities/google-chrome-cve-2021-21123/\n\nhttps://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html", "creation_timestamp": "2021-03-28T20:58:12.000000Z"}, {"uuid": "c077d7b9-0ff0-4ae9-a956-c1a7e9ceb407", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "Telegram/-ddUAdiLaV3uGf4X9T71ZHouT5ez_DkyJ9VbkaCr-zZh1A", "content": "", "creation_timestamp": "2021-03-24T13:06:08.000000Z"}, {"uuid": "1c6a85e1-367f-4a5f-a6f8-da59c2456541", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/2985", "content": "#exploit\nCVE-2021-21123, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131, CVE-2021-21141:\nGoogle Chrome File System Access API vulnerabilities\nhttps://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome", "creation_timestamp": "2022-07-04T20:50:53.000000Z"}, {"uuid": "c0631f63-9e63-4f08-87e4-8b2d6a2e4dd9", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3636", "content": "#Whitepaper\n\"Spoofing Downloaded Filename's Extension\nin Chromium\", 2021.\n\n// This whitepaper illustrates exploitation of an insufficient data validation vulnerability in the Chromium framework (CVE-2021-21123)", "creation_timestamp": "2021-06-18T11:01:26.000000Z"}, {"uuid": "885c23c2-e392-4617-b936-409c4b2b8d81", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "seen", "source": "https://t.me/cissp/3473", "content": "Whitepaper\n\"Spoofing Downloaded Filename's Extension\nin Chromium\", 2021.\n\n// This whitepaper illustrates exploitation of an insufficient data validation vulnerability in the Chromium framework (CVE-2021-21123)", "creation_timestamp": "2026-09-01T17:00:47.747399Z"}, {"uuid": "159c9a36-3390-488f-aa44-1a899442d07a", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "seen", "source": "https://t.me/cissp/2705", "content": "CVE-2021-21123, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131, CVE-2021-21141:\nGoogle Chrome File System Access API vulnerabilities (PoC)\nhttps://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome\n\nExploration of x86-64 ISA using speculative execution\nhttps://github.com/can1357/haruspex\n]-> Speculating The Entire X86-64 Instruction Set In Seconds:\nhttps://blog.can.ac/2021/03/22/speculating-x86-64-isa-with-one-weird-trick\n\nRed Team Tactics\nExploiting JSON Web Token\nhttps://medium.com/@sajan.dhakate/exploiting-json-web-token-jwt-73d172b5bc02\n\nFuzzing Windows\nhttps://github.com/intel/kernel-fuzzer-for-xen-project/wiki/Fuzzing-Windows\n\nThreat Research\nGoogle Chrome Renderer RCE (PoC for CVE-2020-15972)\nhttps://securitylab.github.com/research/one_day_short_of_a_fullchain_renderer\n]-> Full exploit:\nhttps://github.com/github/securitylab/tree/main/SecurityExploits/Chrome/blink/CVE-2020-15972", "creation_timestamp": "2026-09-01T17:00:57.190939Z"}, {"uuid": "bea36bb3-ecb9-4167-afc6-3fca9fac15ba", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "seen", "source": "https://t.me/cissp/3473", "content": "Whitepaper\n\"Spoofing Downloaded Filename's Extension\nin Chromium\", 2021.\n\n// This whitepaper illustrates exploitation of an insufficient data validation vulnerability in the Chromium framework (CVE-2021-21123)", "creation_timestamp": "2026-09-02T01:04:35.623522Z"}, {"uuid": "20e05be7-d5fb-4654-bb23-8ad3df88c2d3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "seen", "source": "https://t.me/cissp/2705", "content": "CVE-2021-21123, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131, CVE-2021-21141:\nGoogle Chrome File System Access API vulnerabilities (PoC)\nhttps://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome\n\nExploration of x86-64 ISA using speculative execution\nhttps://github.com/can1357/haruspex\n]-> Speculating The Entire X86-64 Instruction Set In Seconds:\nhttps://blog.can.ac/2021/03/22/speculating-x86-64-isa-with-one-weird-trick\n\nRed Team Tactics\nExploiting JSON Web Token\nhttps://medium.com/@sajan.dhakate/exploiting-json-web-token-jwt-73d172b5bc02\n\nFuzzing Windows\nhttps://github.com/intel/kernel-fuzzer-for-xen-project/wiki/Fuzzing-Windows\n\nThreat Research\nGoogle Chrome Renderer RCE (PoC for CVE-2020-15972)\nhttps://securitylab.github.com/research/one_day_short_of_a_fullchain_renderer\n]-> Full exploit:\nhttps://github.com/github/securitylab/tree/main/SecurityExploits/Chrome/blink/CVE-2020-15972", "creation_timestamp": "2026-09-02T01:04:47.160537Z"}, {"uuid": "ebe28e72-6a30-46e5-b824-6901eb3eb5fc", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/cissp/3473", "content": "Whitepaper\n\"Spoofing Downloaded Filename's Extension\nin Chromium\", 2021.\n\n// This whitepaper illustrates exploitation of an insufficient data validation vulnerability in the Chromium framework (CVE-2021-21123)", "creation_timestamp": "2026-09-11T04:00:05.826480Z"}, {"uuid": "5078cdb8-932d-4c0e-aedd-d327f7153004", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/cissp/2705", "content": "CVE-2021-21123, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131, CVE-2021-21141:\nGoogle Chrome File System Access API vulnerabilities (PoC)\nhttps://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome\n\nExploration of x86-64 ISA using speculative execution\nhttps://github.com/can1357/haruspex\n]-> Speculating The Entire X86-64 Instruction Set In Seconds:\nhttps://blog.can.ac/2021/03/22/speculating-x86-64-isa-with-one-weird-trick\n\nRed Team Tactics\nExploiting JSON Web Token\nhttps://medium.com/@sajan.dhakate/exploiting-json-web-token-jwt-73d172b5bc02\n\nFuzzing Windows\nhttps://github.com/intel/kernel-fuzzer-for-xen-project/wiki/Fuzzing-Windows\n\nThreat Research\nGoogle Chrome Renderer RCE (PoC for CVE-2020-15972)\nhttps://securitylab.github.com/research/one_day_short_of_a_fullchain_renderer\n]-> Full exploit:\nhttps://github.com/github/securitylab/tree/main/SecurityExploits/Chrome/blink/CVE-2020-15972", "creation_timestamp": "2026-09-11T14:00:05.785806Z"}, {"uuid": "7e3fcfb9-d332-437f-9873-45c359a135d5", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/cissp/2705", "content": "CVE-2021-21123, CVE-2021-21129, CVE-2021-21130, CVE-2021-21131, CVE-2021-21141:\nGoogle Chrome File System Access API vulnerabilities (PoC)\nhttps://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome\n\nExploration of x86-64 ISA using speculative execution\nhttps://github.com/can1357/haruspex\n]-> Speculating The Entire X86-64 Instruction Set In Seconds:\nhttps://blog.can.ac/2021/03/22/speculating-x86-64-isa-with-one-weird-trick\n\nRed Team Tactics\nExploiting JSON Web Token\nhttps://medium.com/@sajan.dhakate/exploiting-json-web-token-jwt-73d172b5bc02\n\nFuzzing Windows\nhttps://github.com/intel/kernel-fuzzer-for-xen-project/wiki/Fuzzing-Windows\n\nThreat Research\nGoogle Chrome Renderer RCE (PoC for CVE-2020-15972)\nhttps://securitylab.github.com/research/one_day_short_of_a_fullchain_renderer\n]-> Full exploit:\nhttps://github.com/github/securitylab/tree/main/SecurityExploits/Chrome/blink/CVE-2020-15972", "creation_timestamp": "2026-09-12T00:00:40.019805Z"}, {"uuid": "edc188c7-edf5-4844-a9d0-2c7c013f7e6e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-21123", "type": "published-proof-of-concept", "source": "https://t.me/cissp/3473", "content": "Whitepaper\n\"Spoofing Downloaded Filename's Extension\nin Chromium\", 2021.\n\n// This whitepaper illustrates exploitation of an insufficient data validation vulnerability in the Chromium framework (CVE-2021-21123)", "creation_timestamp": "2026-09-12T00:00:53.994312Z"}]}