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CVE Record

CVE-2020-2747: Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: SSO Engine).

Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: SSO Engine). Supported versions that are affected are 11.1.2.3.0 and 12.2.1.3.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Access Manager. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Access Manager, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Access Manager accessible data as well as unauthorized read access to a subset of Oracle Access Manager accessible data. CVSS 3.0 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-2747 affects Oracle Access Manager, a product used for single sign-on. A low-privileged attacker with HTTP network access could abuse the issue if another person interacts with the attack. Impact is limited data read and data modification within Oracle Access Manager, with possible effects on connected products.

Executive priority

Treat as a moderate-priority identity-platform issue. It is not documented as actively exploited, but Access Manager supports authentication workflows, and integrity impact in SSO infrastructure can affect broader business systems.

Technical view

Oracle identifies the flaw in Oracle Access Manager SSO Engine versions 11.1.2.3.0 and 12.2.1.3.0. CVSS 3.0 is 5.4: network exploitable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.

Likely exposure

Exposure is likely limited to organizations running the affected Oracle Access Manager versions, especially where OAM HTTP interfaces are reachable by authenticated low-privileged users. The source bundle does not identify affected configurations beyond the listed versions.

Exploitation context

The sources do not report known active exploitation, and the CVE is not marked in KEV. Exploitation requires a low-privileged attacker, HTTP network access, and interaction by another person, which lowers urgency but still matters for identity infrastructure.

Researcher notes

Key constraints are low privileges, HTTP access, and required user interaction. The changed scope note means downstream products may be affected after OAM compromise. Public sources do not provide exploit mechanics, precise patches, or configuration-level mitigations beyond Oracle CPU reference.

Mitigation direction

  • Review Oracle April 2020 CPU guidance for Oracle Access Manager.
  • Patch or upgrade affected OAM 11.1.2.3.0 and 12.2.1.3.0 deployments.
  • Reduce unnecessary HTTP exposure to Oracle Access Manager interfaces.
  • Monitor Oracle guidance for version-specific remediation details.

Validation and detection

  • Inventory Oracle Access Manager versions in production and staging.
  • Confirm whether 11.1.2.3.0 or 12.2.1.3.0 is present.
  • Check whether OAM HTTP access is reachable by low-privileged users.
  • Review logs for unusual OAM data read or modification activity.
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.

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CVE-2020-2747 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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
5.4CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2020-2747Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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 CorporationAccess Manager11.1.2.3.0, 12.2.1.3.0Listed
Weakness

CWE details

No CWE listed

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