{"vulnerability": "cve-2021-2134", "sightings": [{"uuid": "57f47dc4-86dd-4728-8a79-ec3fe170a22e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21345", "type": "seen", "source": "https://t.me/cibsecurity/25283", "content": "\u203c CVE-2021-21345 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker who has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:38:14.000000Z"}, {"uuid": "5954e66a-abbf-47cb-900d-913a8f14e543", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21344", "type": "seen", "source": "https://t.me/cibsecurity/25282", "content": "\u203c CVE-2021-21344 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:38:13.000000Z"}, {"uuid": "7feee2ad-77b5-4d54-872d-1d54721d6a02", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21347", "type": "seen", "source": "https://t.me/cibsecurity/25279", "content": "\u203c CVE-2021-21347 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:38:08.000000Z"}, {"uuid": "de84baee-14b3-41ff-bc4c-bb39b9d14af2", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21348", "type": "seen", "source": "https://t.me/cibsecurity/25278", "content": "\u203c CVE-2021-21348 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to occupy a thread that consumes maximum CPU time and will never return. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:38:07.000000Z"}, {"uuid": "2fb87ca1-d6ba-4a1d-9311-c625ddcba11d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21342", "type": "seen", "source": "https://t.me/cibsecurity/25275", "content": "\u203c CVE-2021-21342 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:38:05.000000Z"}, {"uuid": "444489aa-144f-4a33-b1fb-50f0859c5c65", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21349", "type": "seen", "source": "https://t.me/cibsecurity/25269", "content": "\u203c CVE-2021-21349 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:37:53.000000Z"}, {"uuid": "d29eb6de-2b6a-490d-8bdb-1f84a4a87abd", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21340", "type": "seen", "source": "https://t.me/cibsecurity/25268", "content": "\u203c CVE-2021-21340 \u203c\n\nTYPO3 is an open source PHP based web content management system. In TYPO3 before versions 10.4.14, 11.1.1 it has been discovered that database fields used as _descriptionColumn_ are vulnerable to cross-site scripting when their content gets previewed. A valid backend user account is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1 .\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:37:53.000000Z"}, {"uuid": "18bb9aef-172a-4991-8ff8-fd4d038e3638", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21346", "type": "seen", "source": "https://t.me/cibsecurity/25266", "content": "\u203c CVE-2021-21346 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:37:51.000000Z"}, {"uuid": "a8dd8479-9525-4074-b932-d66e51441368", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21341", "type": "seen", "source": "https://t.me/cibsecurity/25265", "content": "\u203c CVE-2021-21341 \u203c\n\nXStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-03-23T06:37:50.000000Z"}, {"uuid": "d40c84be-9ab6-4556-a24c-811f2bbce5b3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21341", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/2917", "content": "#Threat_Research\nDocumented Vulnerabilities in XStream + Workarounds\n(PoCs for CVE-2021-21341-21351, CVE-2020-26217, CVE-2020-26258, CVE-2020-26259, CVE-2017-7957, CVE-2016-3674, CVE-2013-7285)\nhttp://x-stream.github.io/security.html", "creation_timestamp": "2021-03-16T11:01:03.000000Z"}, {"uuid": "f98c14e4-6eab-4396-ae82-de8183f07ea5", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21345", "type": "seen", "source": "https://bsky.app/profile/beikokucyber.bsky.social/post/3lxavjkngjn2t", "content": "", "creation_timestamp": "2025-08-25T21:02:22.232944Z"}, {"uuid": "5e9b386d-9398-4f2c-8390-c6c90eb1cf92", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21347", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3127", "content": "#Threat_Research \n1. In-depth analysis of the Xstream deserialization RCE vulnerability (PoCs for CVE-2021-21345, CVE-2021-21347, CVE-2021-21350, CVE-2021-21351)\nhttp://blog.topsec.com.cn/xstream\u53cd\u5e8f\u5217\u5316\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u6df1\u5165\u5206\u6790\n2. Cisco RV34X Series:\n- RV34X /upload Authorization Bypass (CVE-2021-1472)\n- RV34X OS Command injection in Cookie string (CVE-2021-1473)\nhttps://www.iot-inspector.com/blog/advisory-cisco-rv34x-authentication-bypass-remote-command-execution", "creation_timestamp": "2021-04-15T11:02:09.000000Z"}, {"uuid": "1e7b7f32-7146-4929-acd8-69a96ddc7bf8", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-21345", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3127", "content": "#Threat_Research \n1. In-depth analysis of the Xstream deserialization RCE vulnerability (PoCs for CVE-2021-21345, CVE-2021-21347, CVE-2021-21350, CVE-2021-21351)\nhttp://blog.topsec.com.cn/xstream\u53cd\u5e8f\u5217\u5316\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u6df1\u5165\u5206\u6790\n2. Cisco RV34X Series:\n- RV34X /upload Authorization Bypass (CVE-2021-1472)\n- RV34X OS Command injection in Cookie string (CVE-2021-1473)\nhttps://www.iot-inspector.com/blog/advisory-cisco-rv34x-authentication-bypass-remote-command-execution", "creation_timestamp": "2021-04-15T11:02:09.000000Z"}]}