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PatchSiren cyber security CVE debrief

CVE-2015-4852 Oracle CVE debrief

CVE-2015-4852 is an Oracle WebLogic Server deserialization of untrusted data vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. Because it is marked as known exploited, organizations running WebLogic Server should treat remediation as urgent and follow Oracle's update guidance.

Vendor
Oracle
Product
WebLogic Server
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Security teams, system administrators, and application owners responsible for Oracle WebLogic Server deployments should care most, especially where instances are internet-facing or difficult to patch quickly.

Technical summary

The vulnerability is described as a deserialization of untrusted data issue in Oracle WebLogic Server. The supplied sources do not provide deeper technical detail, but the CISA KEV listing confirms it is known to be exploited and links to the NVD record for additional context.

Defensive priority

High priority. CISA's Known Exploited Vulnerabilities catalog includes this CVE and gives a required action of applying updates per vendor instructions, so remediation should be prioritized over routine maintenance work.

Recommended defensive actions

  • Apply Oracle updates and patches per vendor instructions as soon as possible.
  • Inventory all Oracle WebLogic Server instances so no deployment is missed.
  • Prioritize remediation for any internet-facing or externally reachable systems.
  • Confirm compensating controls and access restrictions are in place until patching is complete.
  • Track the CISA KEV and NVD entries for any updates tied to this CVE.

Evidence notes

The supplied corpus identifies CVE-2015-4852 as 'Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability.' CISA KEV lists Oracle WebLogic Server as the affected product, adds the entry on 2021-11-03, sets a due date of 2022-05-03, and specifies 'Apply updates per vendor instructions.' The CVE and source-item metadata both use 2021-11-03 as the publication/modified date in this corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2015-4852 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2015-4852

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2015-4852 NVD vulnerability detail

    Publisher, destination, and source semantics verified

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

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.