CVE-2021-39152High· 8.5▾ MidnightPoC availableXStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the …
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 46.8 · likelihood 2.3 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
11%
Nuclei ×1 (last check)
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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 1.4.18.
xstream < 1.4.18Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2021-39150High· 8.5A Server-Side Forgery Request vulnerability in XStream via PriorityQueue unmarshaling
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CVE-2021-39147High· 8.5XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39139High· 8.5XStream is vulnerable to an Arbitrary Code Execution attack