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CVE Record

CVE-2018-1991: IBM API Connect 5.0.0.0, and 5.0.8.6 could could return sensitive information that could provide critical i...

IBM API Connect 5.0.0.0, and 5.0.8.6 could could return sensitive information that could provide critical information as to the underlying software stack in CMC UI headers. IBM X-Force ID: 154284.

LowCVSS 2.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a low-severity information disclosure issue in IBM API Connect. Certain CMC UI headers could reveal details about the underlying software stack. That information alone is not a takeover path, but it can help an attacker profile the environment for later attacks.

Executive priority

Treat this as a hygiene and hardening item, not an emergency. Prioritize remediation during routine maintenance unless the CMC UI is internet-facing or accessible to many privileged users.

Technical view

CVE-2018-1991 affects IBM API Connect versions 5.0.0.0 and 5.0.8.6. The issue is network-accessible, low-complexity, and requires high privileges. Impact is limited to confidentiality, with no cited integrity or availability impact. CVSS 3.0 score is 2.7.

Likely exposure

Exposure is most relevant where affected IBM API Connect CMC UI instances are reachable by privileged users or administrators. Public or broadly reachable management interfaces increase business concern, even though the vulnerability requires high privileges.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. The documented risk is information disclosure through CMC UI headers, not direct code execution, privilege escalation, or service disruption.

Researcher notes

Evidence is limited to the CVE record, IBM reference, and X-Force entry. No CWE is listed in the bundle. The CVSS vector indicates high privileges are required and only low confidentiality impact is claimed.

Mitigation direction

  • Identify IBM API Connect 5.0.0.0 and 5.0.8.6 deployments.
  • Review IBM advisory guidance for the official fix or maintenance level.
  • Restrict CMC UI access to trusted administrative networks and users.
  • Avoid exposing API Connect management interfaces to the public internet.
  • Monitor vendor guidance for any updated remediation details.

Validation and detection

  • Confirm installed IBM API Connect versions against the affected list.
  • Review CMC UI response headers for software stack disclosure.
  • Verify only authorized administrators can reach the CMC UI.
  • After remediation, confirm sensitive stack details are no longer exposed.
  • Check whether asset records capture API Connect management interface exposure.
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

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CVE-2018-1991 mapping review

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

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Vulnerability profileCVE Program record
Severity
Low
CVSS
2.7 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:N/S:U/PR:H/AV:N/C:L/I:N/UI:N/AC: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
2.7CVSS 3.0LowCVSS:3.0/A:N/S:U/PR:H/AV:N/C:L/I:N/UI:N/AC:L/RC:C/RL:O/E:U1.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

2.7Low
CVSS 3.0 vector shape for CVE-2018-1991Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:N/S:U/PR:H/AV:N/C:L/I:N/UI:N/AC: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
IBMAPI Connect5.0.0.0, 5.0.8.6Listed
Weakness

CWE details

No CWE listed

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