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CVE Record

CVE-2021-20362: IBM Cloud Pak for Applications 4.3 is vulnerable to cross-site scripting.

IBM Cloud Pak for Applications 4.3 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 195033.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Cloud Pak for Applications 4.3 has a Web UI cross-site scripting flaw. An authenticated user could place JavaScript into the interface, changing trusted-session behavior and potentially exposing credentials. The business risk is moderate, focused on environments still running this specific version.

Executive priority

Prioritize remediation for internet-accessible or broadly accessible administrative interfaces. This is not described as actively exploited, but credential disclosure inside trusted sessions can create follow-on business impact.

Technical view

CVE-2021-20362 is an XSS vulnerability in IBM Cloud Pak for Applications 4.3. The CVSS 3.0 score is 5.4 with network access, low privileges, required user interaction, changed scope, and low confidentiality and integrity impact. Availability impact is not indicated.

Likely exposure

Exposure appears limited to organizations running IBM Cloud Pak for Applications 4.3. The source bundle does not identify other affected IBM Cloud Pak versions, CPEs, or dependent products.

Exploitation context

The source bundle does not cite active exploitation, and KEV status is false. The CVSS exploit maturity value is unproven, so treat exploitation evidence as incomplete rather than confirmed.

Researcher notes

No CWE is listed in the bundle. The key constraints are authenticated low-privilege access and required user interaction. Evidence does not name a specific vulnerable parameter, patch level, or exploit chain, so avoid assumptions beyond IBM Cloud Pak for Applications 4.3 Web UI XSS.

Mitigation direction

  • Inventory IBM Cloud Pak for Applications deployments and identify any version 4.3 instances.
  • Review IBM advisory 6471343 for the vendor-supported remediation path.
  • Apply IBM-specified fixes or upgrades through the normal change-control process.
  • Restrict administrative and Web UI access to trusted users and networks.
  • Monitor for unexpected UI content changes or credential-related alerts.

Validation and detection

  • Confirm product name and version from deployment records or platform administration data.
  • Check whether IBM advisory 6471343 remediation has been applied.
  • Review access controls for Web UI users with write or content-modification permissions.
  • Run approved authenticated application security testing in a non-production environment.
  • Document residual exposure for any 4.3 systems awaiting remediation.
Prepared
Confidence
medium
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

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CVE-2021-20362 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/AC:L/I:L/A:N/PR:L/UI:R/AV:N/C:L/S:C/RC:C/E:U/RL:O

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
5.4CVSS 3.0MediumCVSS:3.0/AC:L/I:L/A:N/PR:L/UI:R/AV:N/C:L/S:C/RC:C/E:U/RL:O2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2021-20362Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
IBMCloud Pak for Applications4.3Listed
Weakness

CWE details

No CWE listed

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