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CVE Record

CVE-2021-20550: IBM Content Navigator 3.0.CD is vulnerable to cross-site scripting.

IBM Content Navigator 3.0.CD 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: 199168.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Content Navigator 3.0.CD has a cross-site scripting flaw that could let an authenticated user place JavaScript into the web interface. If another user interacts with the affected UI, the script could change page behavior and potentially expose credentials within a trusted session.

Executive priority

Prioritize in normal vulnerability management cycles, faster for externally accessible or partner-facing deployments. The issue is not rated critical, but credential exposure inside a trusted session can create business impact if exploited against privileged users.

Technical view

The CVE describes a network-reachable XSS issue in IBM Content Navigator 3.0.CD. CVSS 3.0 is 5.4 with low attack complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, and no availability impact.

Likely exposure

Exposure is limited to organizations running IBM Content Navigator 3.0.CD. Risk is higher where the application is accessible to many authenticated users, external partners, or internet-facing identity zones, because exploitation requires a logged-in user path and user interaction.

Exploitation context

The provided sources do not show CISA KEV listing or confirmed active exploitation. IBM X-Force tracks the issue as ID 199168. The CVSS vector indicates exploit maturity was unproven when scored, so treat exploitation evidence as incomplete.

Researcher notes

Sources identify the affected product and impact but do not provide detailed affected build ranges, payload conditions, or fixed-version text in the supplied bundle. Avoid assuming broader IBM products are affected. Validate only against IBM Content Navigator 3.0.CD and IBM’s advisory.

Mitigation direction

  • Review IBM advisory 6447143 for the vendor-supported fix or upgrade path.
  • Apply IBM-recommended updates for affected IBM Content Navigator 3.0.CD deployments.
  • Restrict access to trusted users until the vendor fix is applied.
  • Review session and credential-handling controls for affected web UI workflows.

Validation and detection

  • Inventory IBM Content Navigator versions and confirm any 3.0.CD deployments.
  • Check whether IBM advisory 6447143 remediation is applied.
  • Run authenticated XSS regression testing using safe, non-executing markers.
  • Review logs for unusual UI content changes or credential-related anomalies.
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-2021-20550 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/PR:L/C:L/A:N/UI:R/S:C/AC:L/I:L/AV:N/E:U/RC:C/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/PR:L/C:L/A:N/UI:R/S:C/AC:L/I:L/AV:N/E:U/RC:C/RL:O2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2021-20550Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/PR:L/C:L/A:N/UI:R/S:C/AC:L/I:L/AV:N/E:U/RC:C/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
IBMContent Navigator3.0.CDListed
Weakness

CWE details

No CWE listed

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