XStream is a simple library to serialize objects to XML and back again. In affected versions this 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Published 2021-08-23 18:15:13
Updated 2022-10-05 12:20:47
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Execute code

Exploit prediction scoring system (EPSS) score for CVE-2021-39151

2.46%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 89 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39151

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.0
MEDIUM AV:N/AC:M/Au:S/C:P/I:P/A:P
6.8
6.4
NIST
8.5
HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
1.8
6.0
NIST
8.5
HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
1.8
6.0
GitHub, Inc.

CWE ids for CVE-2021-39151

  • The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.
    Assigned by:
    • nvd@nist.gov (Secondary)
    • security-advisories@github.com (Primary)
  • The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
    Assigned by:
    • nvd@nist.gov (Secondary)
    • security-advisories@github.com (Primary)

References for CVE-2021-39151

Products affected by CVE-2021-39151

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