CVE-2021-21351— XStream is vulnerable to an Arbitrary Code Execution attack
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I. Basic Information for CVE-2021-21351
Vulnerability Information
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Vulnerability Title
XStream is vulnerable to an Arbitrary Code Execution attack
Source: NVD (National Vulnerability Database)
Vulnerability Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
XStream 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XStream是XStream（Xstream）团队的一个轻量级的、简单易用的开源Java类库，它主要用于将对象序列化成XML（JSON）或反序列化为对象。 XStream 1.4.16 之前版本存在代码问题漏洞，攻击者可利用该漏洞仅通过操作已处理的输入流来加载和执行远程主机上的任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
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Affected Products
II. Public POCs for CVE-2021-21351
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | XStream before 1.4.16 is susceptible to remote code execution. An attacker can load and execute arbitrary code from a remote host via manipulating the processed input stream, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21351.yaml | POC Details |
| 2 | None | https://github.com/Threekiii/Awesome-POC/blob/master/%E5%BC%80%E5%8F%91%E6%A1%86%E6%9E%B6%E6%BC%8F%E6%B4%9E/XStream%20%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%E5%91%BD%E4%BB%A4%E6%89%A7%E8%A1%8C%E6%BC%8F%E6%B4%9E%20CVE-2021-21351.md | POC Details |
| 3 | https://github.com/vulhub/vulhub/blob/master/xstream/CVE-2021-21351/README.md | POC Details |
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-21351
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- https://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
- https://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
- https://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
- https://github.com/x-stream/xstream/security/advisories/GHSA-hrcp-8f3q-4w2cx_refsource_CONFIRM
- http://x-stream.github.io/changes.html#1.4.16x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210430-0002/x_refsource_CONFIRM
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2021-21351
Same Patch Batch · x-stream · 2021-03-22 · 11 CVEs total
| CVE-2021-21341 | 7.5 HIGH | XStream can cause a Denial of Service |
| CVE-2021-21346 | 6.1 MEDIUM | XStream is vulnerable to an Arbitrary Code Execution attack |
| CVE-2021-21347 | 6.1 MEDIUM | XStream is vulnerable to an Arbitrary Code Execution attack |
| CVE-2021-21349 | 6.1 MEDIUM | A Server-Side Forgery Request can be activated unmarshalling with XStream to access data s |
| CVE-2021-21345 | 5.8 MEDIUM | XStream is vulnerable to a Remote Command Execution attack |
| CVE-2021-21342 | 5.3 MEDIUM | A Server-Side Forgery Request can be activated unmarshalling with XStream to access data s |
| CVE-2021-21343 | 5.3 MEDIUM | XStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling a |
| CVE-2021-21344 | 5.3 MEDIUM | XStream is vulnerable to an Arbitrary Code Execution attack |
| CVE-2021-21348 | 5.3 MEDIUM | XStream is vulnerable to an attack using Regular Expression for a Denial of Service (ReDos |
| CVE-2021-21350 | 5.3 MEDIUM | XStream is vulnerable to an Arbitrary Code Execution attack |
IV. Related Vulnerabilities
Same product: xstream
- CVE-2024-47072
XStream is vulnerable to a Denial of Service attack due to s - CVE-2022-41966
XStream Denial of Service via stack overflow - CVE-2022-40151
Stack Buffer Overflow in xstream - CVE-2021-43859
Denial of Service by injecting highly recursive collections - CVE-2021-39150
A Server-Side Forgery Request vulnerability in XStream via P
Same vendor: x-stream
- CVE-2024-47072
XStream is vulnerable to a Denial of Service attack due to s - CVE-2022-41966
XStream Denial of Service via stack overflow - CVE-2021-43859
Denial of Service by injecting highly recursive collections - CVE-2021-39150
A Server-Side Forgery Request vulnerability in XStream via P - CVE-2021-39152
A Server-Side Forgery Request vulnerability in XStream via H
Same weakness: CWE-434
- CVE-2021-47943
TextPattern CMS 4.8.7 Remote Code Execution via File Upload - CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme - CVE-2026-41517
Emlog: Remote Code Execution via Malicious Plugin Upload - CVE-2026-6692
Slider Revolution 7.0.0 - 7.0.10 - Authenticated (Subscriber - CVE-2026-41587
CI4MS: Unrestricted PHP File Upload via Theme Installation L
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