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CVE-2015-4852: Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability

criticalknown exploitedpublic exploitCVE-2015-4852
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.

CSIRTS triage

vendor: Oracleproduct: WebLogic ServerUnsafe deserializationRemote code execution
What
A deserialization vulnerability within Apache Commons can allow for remote code execution in WebLogic Server.
Who is affected
Users of Oracle WebLogic Server are affected by this vulnerability.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of Oracle WebLogic Server.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2015-4852

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2015-4852coverage & exploitation statusNVD · CVE.org

Recent advisories for Oracle WebLogic Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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