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CVE Record

CVE-2021-2004: Vulnerability in the Siebel Core - Server BizLogic Script product of Oracle Siebel CRM (component: Integrat...

Vulnerability in the Siebel Core - Server BizLogic Script product of Oracle Siebel CRM (component: Integration - Scripting). Supported versions that are affected are 20.12 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel Core - Server BizLogic Script. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Siebel Core - Server BizLogic Script accessible data. CVSS 3.1 Base Score 4.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2004 is a medium-severity Oracle Siebel CRM issue that could let a low-privileged user reach the affected Siebel scripting component over HTTP and read some data they should not access. The known impact is limited to confidentiality, not data modification or service outage.

Executive priority

Prioritize this for normal patch governance, with faster handling if Siebel contains sensitive customer, sales, or regulated data. The score is moderate, but easy authenticated exploitation can matter in environments with broad user access or weak segmentation.

Technical view

Oracle describes an easily exploitable vulnerability in Siebel Core - Server BizLogic Script, component Integration - Scripting, affecting supported versions 20.12 and prior. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, meaning network-reachable, low-complexity, authenticated exploitation with limited confidentiality impact.

Likely exposure

Exposure is most relevant where Oracle Siebel CRM 20.12 or earlier is deployed and the affected Siebel HTTP-accessible component is reachable by low-privileged users. Internet exposure is not stated in the sources, so assess both external and internal network paths.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Oracle says exploitation is easy and requires low privileges plus HTTP network access, so insider, compromised account, or poorly segmented user access are the main concern.

Researcher notes

Evidence is limited to Oracle/CVE metadata. The affected product naming differs slightly between the description and affected entry, so validate against Oracle’s advisory and local Siebel inventory. Do not assume public exploit activity from the provided sources.

Mitigation direction

  • Review Oracle January 2021 CPU guidance for CVE-2021-2004.
  • Patch or upgrade affected Siebel CRM deployments per Oracle guidance.
  • Restrict HTTP access to Siebel components to trusted networks.
  • Limit low-privileged Siebel accounts to required data access only.
  • Monitor Siebel access logs for unusual read activity.

Validation and detection

  • Inventory Siebel CRM versions and identify 20.12 or earlier systems.
  • Confirm whether Server BizLogic Script and Integration - Scripting are present.
  • Verify Oracle CPU patch status in change records.
  • Check whether low-privileged accounts can reach Siebel over HTTP.
  • Review logs for abnormal access to sensitive Siebel data.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-2004 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
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2021-2004Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 CorporationSiebel Core - Server Framework20.12 and priorListed
Weakness

CWE details

No CWE listed

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