CVE-2021-39149
HighCVSS 8.5Exploitation Probability (EPSS)
Very high risk92th percentile - higher than 92% of all known CVEs
Summary
XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to execute arbitrary code from a remote host by manipulating the processed input stream. Users who configured XStream's security framework with a whitelist limited to minimal required types are not affected. Version 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
Risk Assessment
The risk for the organization is remote code execution, which can lead to full system compromise or data breach. The attack can be performed without authentication if the application processes untrusted XML data.
Recommendation
It is recommended to immediately upgrade XStream to version 1.4.18 or later and configure the security framework with a whitelist of types. Also, limit processing of untrusted input data.
Other vulnerabilities in XStream
See all- CVE-2021-39152High
XStream is a library to serialize objects to XML and back. This vulnerability allows a remote attacker to request data from internal resources not publicly available by manipulating the processed input stream with Java runtime version 14 to 8. Users who followed the recommendation to set up XStream's security framework with a whitelist limited to minimal required types are not affected. If relying on the default blacklist of the Security Framework, you must use at least version 1.4.18.
- CVE-2021-39154High
XStream is a library to serialize objects to XML and back. This vulnerability allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. Users who followed the recommendation to set up XStream's security framework with a whitelist limited to minimal required types are not affected. XStream 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39153High
XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to execute arbitrary code from a remote host by manipulating the processed input stream, if using the version out of the box with Java runtime version 14 to 8 or with JavaFX installed. Users who configured the security framework with a whitelist are not affected. Version 1.4.18 no longer uses a blacklist by default.
- CVE-2021-39151High
XStream is a library to serialize objects to XML and back. This vulnerability allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. Users who followed the recommendation to set up XStream's security framework with a whitelist limited to minimal required types are not affected. XStream 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39148High
XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to execute arbitrary code from a remote host by manipulating the processed input stream. Users who configured XStream's security framework with a whitelist limited to minimal required types are not affected. Version 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39147High
XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to execute arbitrary code from a remote host by manipulating the processed input stream. Users who configured XStream's security framework with a whitelist limited to minimal required types are not affected. Version 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39146High
XStream is a library to serialize objects to XML and back. This vulnerability allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. Users who followed the recommendation to set up XStream's security framework with a whitelist limited to minimal required types are not affected. XStream 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39145High
XStream is a library for serializing objects to XML and back. The vulnerability allows a remote attacker to execute arbitrary code from a remote host by manipulating the processed input stream. Users who configured XStream's security framework with a whitelist limited to minimal required types are not affected. Version 1.4.18 no longer uses a blacklist by default, as it cannot be secured for general purpose.
- CVE-2021-39144HighActively exploited
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker with 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
- CVE-2021-39141High
Vulnerability in XStream in affected versions allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. Users following the whitelist recommendation are not affected.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

