Security readout for executives and security teams
Plain-English summary
CVE-2021-2302 is a critical Oracle Platform Security for Java issue in Oracle Fusion Middleware. An unauthenticated attacker with network access over HTTP could compromise the affected OPSS component, with potential full confidentiality, integrity, and availability impact.
Executive priority
Treat as urgent for any reachable Oracle Fusion Middleware environment. The issue allows unauthenticated takeover with maximum business impact, although this bundle does not prove active exploitation.
Technical view
Affected OPSS versions are 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0. The CVSS 3.1 score is 9.8: network exploitable, low complexity, no privileges, no user interaction, unchanged scope, and high CIA impact.
Likely exposure
Exposure is likely where Oracle Fusion Middleware deployments include the affected OPSS versions and HTTP access is reachable from untrusted networks, partner networks, or broad internal segments.
Exploitation context
The bundle supports unauthenticated remote exploitation via HTTP and possible OPSS takeover. It does not show CISA KEV listing or cite confirmed active exploitation.
Researcher notes
The provided sources do not include CWE details or root-cause mechanics. Keep analysis scoped to OPSS, affected versions, HTTP network attack vector, and vendor advisory remediation tracking.
Mitigation direction
- Identify all Oracle Fusion Middleware systems using affected OPSS versions.
- Apply Oracle April 2021 CPU guidance or later vendor-supported fixes.
- Restrict HTTP access to trusted networks until remediation is complete.
- Prioritize internet-facing and broadly reachable internal middleware first.
- Check Oracle guidance if patch applicability is unclear.
Validation and detection
- Confirm OPSS version on each Oracle Fusion Middleware host.
- Verify Oracle CPU remediation status against vendor guidance.
- Review whether HTTP endpoints are reachable from untrusted networks.
- Check logs for suspicious unauthenticated HTTP activity against middleware endpoints.
- Document remaining exceptions with owner, exposure, and remediation date.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-2302 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuapr2021.htmlCVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-460/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.