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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2021-21349

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.

HIGH 8.6EPSS 46.8%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 46.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

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 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.

CVSS 3.1
8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
46.83% probability · 99th percentile
CISA KEV
Not listed
Weakness
CWE-502, CWE-918
Affected
netapp/oncommand insight · apache/activemq · apache/jmeter · xstream/xstream · debian/debian linux · fedoraproject/fedora · oracle/banking enterprise default management · oracle/banking platform · oracle/banking virtual account management · oracle/business activity monitoring · oracle/communications billing and revenue management elastic charging engine · oracle/communications policy management · oracle/communications unified inventory management · oracle/graalvm · oracle/java se · oracle/retail xstore point of service · oracle/webcenter portal
Source
security-advisories@github.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.