LiveActive security incident?Get immediate response
CVE Record

CVE-2021-20430: IBM i2 Analyst's Notebook Premium (IBM i2 Analyze 4.3.0, 4.3.1, and 4.3.2) could allow a remote attacker to...

IBM i2 Analyst's Notebook Premium (IBM i2 Analyze 4.3.0, 4.3.1, and 4.3.2) could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system. IBM X-Force ID: 196341.

MediumCVSS 5.3Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM i2 Analyze versions 4.3.0, 4.3.1, and 4.3.2 may reveal sensitive technical information through detailed browser error messages. The issue is not described as direct system takeover, but leaked internals can help attackers plan later attacks.

Executive priority

Prioritize remediation as a moderate risk, higher if the affected service is internet-facing or accessible to untrusted users. The main business concern is intelligence leakage that supports follow-on attacks.

Technical view

CVE-2021-20430 is an information disclosure issue in IBM i2 Analyst's Notebook Premium using IBM i2 Analyze 4.3.0 through 4.3.2. CVSS 3.0 is 5.3: network reachable, low complexity, no privileges, no user interaction, low confidentiality impact, no integrity or availability impact.

Likely exposure

Exposure is limited to organizations running IBM i2 Analyze 4.3.0, 4.3.1, or 4.3.2, especially where browser-accessible interfaces can be reached by untrusted users or the internet.

Exploitation context

The provided data does not show CISA KEV listing or cited active exploitation. The CVSS vector marks exploit maturity as unproven, so treat exploitation evidence as incomplete rather than confirmed.

Researcher notes

No CWE is supplied in the source bundle. IBM X-Force ID is 196341. The source data supports unauthenticated remote information disclosure, but does not provide exploit details, affected configurations beyond versions, or specific fix text.

Mitigation direction

  • Inventory IBM i2 Analyze deployments and identify versions 4.3.0, 4.3.1, and 4.3.2.
  • Review IBM's advisory and apply the official remediation for CVE-2021-20430.
  • Limit public access to i2 Analyze interfaces where operationally feasible.
  • Ensure application errors do not expose detailed technical messages in browser responses.
  • Monitor logs for unusual error patterns against i2 Analyze endpoints.

Validation and detection

  • Confirm installed IBM i2 Analyze versions against the affected version list.
  • Verify remediation status against IBM advisory records or change tickets.
  • In a controlled test, confirm browser errors no longer disclose technical details.
  • Review logs for stack traces, verbose errors, or sensitive diagnostic output.
Prepared
Confidence
high
Sources
4

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-2021-20430 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:N/I:N/C:L/AC:L/UI:N/AV:N/PR:N/S:U/RL:O/E:U/RC:C

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
3Source 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
5.3CVSS 3.0MediumCVSS:3.0/A:N/I:N/C:L/AC:L/UI:N/AV:N/PR:N/S:U/RL:O/E:U/RC:C3.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.3Medium
CVSS 3.0 vector shape for CVE-2021-20430Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:N/I:N/C:L/AC:L/UI:N/AV:N/PR:N/S:U/RL:O/E:U/RC:C

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
IBMi2 Analyze4.3.0, 4.3.1, 4.3.2Listed
Weakness

CWE details

No CWE listed

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