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CVE Record

CVE-2020-4903: IBM API Connect V10 and V2018 could allow an attacker who has intercepted a registration invitation link to...

IBM API Connect V10 and V2018 could allow an attacker who has intercepted a registration invitation link to impersonate the registered user or obtain sensitive information. IBM X-Force ID: 191105.

MediumCVSS 4.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM API Connect could mishandle registration invitation links. If someone intercepts one of those links, they may impersonate the intended registered user or access sensitive information. The business risk is mainly account onboarding compromise, not broad system takeover. The attack appears constrained because it depends on obtaining a valid invitation link.

Executive priority

Treat as a moderate-priority identity and onboarding risk. Prioritize remediation for internet-facing or partner-facing API Connect environments, especially where invitation links cross email or ticketing systems. This does not currently have source-supported evidence of active exploitation.

Technical view

CVE-2020-4903 affects IBM API Connect V2018 and V10 versions listed in the source bundle. CVSS 3.0 score is 4.8 with network attack vector, high attack complexity, no privileges, no user interaction, low confidentiality impact, low integrity impact, and no availability impact. IBM tracks it as X-Force ID 191105.

Likely exposure

Exposure is most likely in organizations running IBM API Connect 2018.4.1.0, 2018.4.1.13, 10.0.0.0, or 10.0.1.1 and using registration invitation workflows. Risk increases where invitation links can be intercepted, forwarded, logged, or stored insecurely.

Exploitation context

The provided sources do not state active exploitation, and this CVE is not listed as KEV in the bundle. The CVSS vector marks exploit maturity as unproven. The described attacker condition is interception of a registration invitation link, which raises complexity and limits opportunistic exploitation.

Researcher notes

The evidence is limited to the CVE description, IBM advisory references, X-Force entry, affected versions, and CVSS metadata. No CWE, exploit details, or specific patch version text is included in the supplied bundle. Avoid expanding scope beyond IBM API Connect V2018 and V10 listed versions.

Mitigation direction

  • Review IBM advisory 6426703 for official remediation guidance.
  • Inventory IBM API Connect versions against the affected list.
  • Upgrade or apply vendor-provided fixes where applicable.
  • Revoke and reissue exposed or stale registration invitation links.
  • Reduce link exposure in email, logs, tickets, and shared channels.

Validation and detection

  • Confirm deployed IBM API Connect version and build.
  • Check whether registration invitation workflows are enabled.
  • Review logs and support tickets for exposed invitation URLs.
  • Verify vendor remediation has been applied in staging and production.
  • Test that old invitation links cannot be reused after remediation.
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.

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CVE-2020-4903 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/S:U/C:L/A:N/AC:H/UI:N/PR:N/I:L/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
4.8CVSS 3.0MediumCVSS:3.0/AV:N/S:U/C:L/A:N/AC:H/UI:N/PR:N/I:L/RL:O/E:U/RC:C2.22.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.8Medium
CVSS 3.0 vector shape for CVE-2020-4903Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/S:U/C:L/A:N/AC:H/UI:N/PR:N/I:L/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
IBMAPI Connect2018.4.1.0, 2018.4.1.13, 10.0.0.0, 10.0.1.1Listed
Weakness

CWE details

No CWE listed

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