CVE-2015-4852
Published: November 3, 2021
Official Description
Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.
CISA KEV Advisory
Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability
Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Oracle WebLogic Server allows for remote code execution due to a flaw in how it handles untrusted data, specifically within Apache Commons. Given its high EPSS score of 0.92721 and inclusion in CISA's KEV, this vulnerability is highly likely to be exploited and poses a significant risk.
Active exploitation of this vulnerability has been observed in the wild, and it is confirmed to be in CISA's Known Exploited Vulnerabilities catalog. This indicates a critical and immediate threat.
Organizations should apply the latest security patches and updates for Oracle WebLogic Server to address this deserialization vulnerability. Implement robust input validation and deserialization best practices to prevent similar issues.
Technical Analysis
CVE-2015-4852 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2015-4852 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-4852 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1