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CVE Record

CVE-2020-4803: IBM Edge 4.2 allows web pages to be stored locally which can be read by another user on the system.

IBM Edge 4.2 allows web pages to be stored locally which can be read by another user on the system. IBM X-Force ID: 189535.

MediumCVSS 4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Edge 4.2 may save web pages locally in a way that another user on the same system can read. The business risk is limited data exposure on shared systems, not remote takeover. Impact depends on what sensitive page content IBM Edge stored locally.

Executive priority

Address during normal vulnerability remediation, with higher priority for shared systems handling sensitive web content. This is not evidenced as actively exploited or remotely exploitable in the provided sources.

Technical view

CVE-2020-4803 is a local information disclosure issue in IBM Edge 4.2. The CVSS v3.0 score is 4.0 with local attack vector, low complexity, no privileges or user interaction, low confidentiality impact, and no integrity or availability impact.

Likely exposure

Exposure is most relevant where IBM Edge 4.2 runs on shared systems or systems with multiple local users. Single-user deployments have lower practical risk unless another account can access the same local storage area.

Exploitation context

The provided sources do not show active exploitation, and the CVE is not listed as KEV. Exploit maturity is marked unproven in the supplied CVSS vector. Treat this as a local confidentiality issue requiring local system access.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, IBM advisory reference, and IBM X-Force entry. No CWE, exploit details, or specific fixed version are included in the supplied bundle, so validation should focus on product presence and local data exposure.

Mitigation direction

  • Identify any IBM Edge 4.2 installations.
  • Review IBM advisory guidance before changing production systems.
  • Apply IBM-provided remediation if the product is still deployed.
  • Limit local user access on affected shared systems.
  • Avoid storing sensitive page content locally where feasible.

Validation and detection

  • Inventory systems for IBM Edge 4.2.
  • Confirm whether multiple local users can access affected hosts.
  • Review local storage permissions for IBM Edge saved web content.
  • Check IBM advisory and X-Force entry for remediation status.
  • Document whether sensitive page content could be exposed.
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-2020-4803 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4 (3.0)
Known Exploited
No
Published

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

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
4CVSS 3.0MediumCVSS:3.0/UI:N/S:U/I:N/PR:N/AC:L/C:L/A:N/AV:L/RC:C/RL:O/E:U2.51.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4Medium
CVSS 3.0 vector shape for CVE-2020-4803Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
IBMEdge4.2Listed
Weakness

CWE details

No CWE listed

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