{"vulnerability": "CVE-2021-25833", "sightings": [{"uuid": "c7eb2aba-d75e-4600-ab80-7f51e9ebc866", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25833", "type": "seen", "source": "https://t.me/cibsecurity/24296", "content": "\u203c CVE-2021-25833 \u203c\n\nA file extension handling issue was found in [server] module of ONLYOFFICE DocumentServer v4.2.0.71-v5.6.0.21. The file extension is controlled by an attacker through the request data and leads to arbitrary file overwriting. Using this vulnerability, a remote attacker can obtain remote code execution on DocumentServer.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-01T18:43:15.000000Z"}, {"uuid": "d909dba3-b766-4802-9aad-8e51f83148e3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25833", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/4625", "content": "#exploit\n1. CVE-2021-31862:\nSysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication\nhttps://github.com/RobertDra/CVE-2021-31862\n\n2. Research and PoC exploits for ONLYOFFICE\n(CVE-2021-25829, CVE-2021-25830, CVE-2021-25831, CVE-2021-25832, CVE-2021-25833)\nhttps://github.com/merrychap/POC-onlyoffice/tree/master", "creation_timestamp": "2021-10-30T14:32:34.000000Z"}, {"uuid": "6a581e5e-e42b-4b02-8bda-5ddaf7add158", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25833", "type": "seen", "source": "https://t.me/cissp/4713", "content": "Threat Research\n1. Shrootless Vulnerability in MacOS (CVE-2021-30892)\nhttps://www.microsoft.com/security/blog/2021/10/28/microsoft-finds-new-macos-vulnerability-shrootless-that-could-bypass-system-integrity-protection\n2. Apple XAR - Arbitrary File Write (CVE-2021-30833)\nhttps://research.nccgroup.com/2021/10/28/technical-advisory-apple-xar-arbitrary-file-write-cve-2021-30833\n\nexploit\n1. CVE-2021-31862:\nSysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication\nhttps://github.com/RobertDra/CVE-2021-31862\n\n2. Research and PoC exploits for ONLYOFFICE\n(CVE-2021-25829, CVE-2021-25830, CVE-2021-25831, CVE-2021-25832, CVE-2021-25833)\nhttps://github.com/merrychap/POC-onlyoffice/tree/master\n\nMalware analysis\n1. More Malicious NPM Libraries\nhttps://www.theregister.com/2021/10/27/npm_roblox_ransomware\n2. New AbstractEmu malware roots Android devices\nhttps://blog.lookout.com/lookout-discovers-global-rooting-malware-campaign\n\nCloud Security\nSnowcat: World\u2019s First Dedicated Security Scanner for Istio\nhttps://www.praetorian.com/blog/introducing-snowcat\n]-> https://github.com/praetorian-inc/snowcat", "creation_timestamp": "2026-09-01T17:00:36.901288Z"}, {"uuid": "98f28006-e1e4-4e7c-969c-6e76e20499ed", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-25833", "type": "seen", "source": "https://t.me/cissp/4713", "content": "Threat Research\n1. Shrootless Vulnerability in MacOS (CVE-2021-30892)\nhttps://www.microsoft.com/security/blog/2021/10/28/microsoft-finds-new-macos-vulnerability-shrootless-that-could-bypass-system-integrity-protection\n2. Apple XAR - Arbitrary File Write (CVE-2021-30833)\nhttps://research.nccgroup.com/2021/10/28/technical-advisory-apple-xar-arbitrary-file-write-cve-2021-30833\n\nexploit\n1. CVE-2021-31862:\nSysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication\nhttps://github.com/RobertDra/CVE-2021-31862\n\n2. Research and PoC exploits for ONLYOFFICE\n(CVE-2021-25829, CVE-2021-25830, CVE-2021-25831, CVE-2021-25832, CVE-2021-25833)\nhttps://github.com/merrychap/POC-onlyoffice/tree/master\n\nMalware analysis\n1. More Malicious NPM Libraries\nhttps://www.theregister.com/2021/10/27/npm_roblox_ransomware\n2. New AbstractEmu malware roots Android devices\nhttps://blog.lookout.com/lookout-discovers-global-rooting-malware-campaign\n\nCloud Security\nSnowcat: World\u2019s First Dedicated Security Scanner for Istio\nhttps://www.praetorian.com/blog/introducing-snowcat\n]-> https://github.com/praetorian-inc/snowcat", "creation_timestamp": "2026-09-02T01:04:21.683186Z"}]}