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CVE Record

CVE-2021-2449: Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside I...

Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Filters). The supported version that is affected is 8.5.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Outside In Technology. Note: Outside In Technology is a suite of software development kits (SDKs). The protocol and CVSS Base Score depend on the software that uses Outside In Technology. The CVSS score assumes that the software passes data received over a network directly to Outside In Technology, but if data is not received over a network the CVSS score may be lower. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-2449 is a denial-of-service flaw in Oracle Outside In Technology 8.5.5. If an application exposes Outside In processing to HTTP-supplied content, an unauthenticated attacker could cause the component to hang or repeatedly crash. The known impact is availability loss, not data theft or code execution.

Executive priority

Treat this as a high-priority availability risk for systems that process external documents. Prioritize internet-facing or customer-facing workflows first. Business urgency is lower for isolated internal uses with trusted inputs.

Technical view

Oracle describes an easily exploitable vulnerability in Outside In Filters. The CVSS 7.5 score assumes network access, no privileges, no user interaction, and high availability impact. Oracle notes Outside In is an SDK, so real exposure and protocol depend on the embedding software and whether network data is passed directly into Outside In.

Likely exposure

Highest exposure is in applications embedding Oracle Outside In Technology 8.5.5 and processing untrusted documents or content received over HTTP. Exposure may be lower when inputs are local, trusted, or isolated from network-facing workflows.

Exploitation context

The provided sources do not show active exploitation, and the bundle marks KEV as false. The vulnerability is described as easy to exploit, but only for denial of service. No exploit details are provided here.

Researcher notes

The CVSS vector is availability-only: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. No CWE is listed in the bundle. Scope is limited to Outside In Technology 8.5.5, but exposure depends on the embedding application and input path.

Mitigation direction

  • Review Oracle's July 2021 Critical Patch Update guidance for Outside In Technology.
  • Identify products or custom applications bundling Outside In Technology 8.5.5.
  • Check vendor guidance for applications that include Oracle Outside In SDKs.
  • Reduce direct processing of untrusted HTTP-supplied content where feasible.
  • Add operational monitoring for document-processing hangs and repeatable crashes.

Validation and detection

  • Inventory servers and applications for Oracle Outside In Technology 8.5.5.
  • Map document, upload, indexing, or conversion flows that call Outside In.
  • Confirm whether HTTP-received data is passed directly into Outside In.
  • Review logs for repeated crashes or hangs in Outside In processing paths.
  • Track Oracle and application-vendor advisories for named fixed versions.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2021-2449 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-2449Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationOutside In Technology8.5.5Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.