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CVE Record

CVE-2018-1727: IBM InfoSphere Information Server 9.1, 11.3, 11.5, and 11.7 is vulnerable to a XML External Entity Injectio...

IBM InfoSphere Information Server 9.1, 11.3, 11.5, and 11.7 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 147630.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

IBM InfoSphere Information Server can mishandle XML input in affected versions, allowing an authenticated remote attacker to read sensitive information or cause memory resource consumption. This matters most where the platform processes XML from users, integrations, or data pipelines.

Executive priority

High priority for organizations using affected IBM InfoSphere versions in data-processing environments. The main business risk is sensitive information exposure, with secondary availability risk from memory consumption.

Technical view

CVE-2018-1727 is an XML External Entity issue in IBM InfoSphere Information Server 9.1, 11.3, 11.5, and 11.7. The CVSS 3.0 vector is network-accessible, low complexity, low privileges, no user interaction, high confidentiality impact, and low availability impact.

Likely exposure

Exposure is likely limited to organizations running the listed IBM InfoSphere Information Server versions, especially deployments where authenticated users or integrations can submit XML data over the network.

Exploitation context

The provided sources do not show active exploitation, and KEV status is false. IBM X-Force lists exploitability as unproven in the supplied CVSS metadata, so treat this as plausible but not confirmed in the wild.

Researcher notes

Evidence identifies the vulnerability class, affected versions, CVSS vector, and IBM X-Force ID 147630. The source bundle does not provide exploit details, affected components beyond the product, or specific fixed build numbers.

Mitigation direction

  • Identify all IBM InfoSphere Information Server deployments and exact versions.
  • Review IBM advisory guidance for supported fixes or interim mitigations.
  • Prioritize vendor remediation for versions 9.1, 11.3, 11.5, and 11.7.
  • Restrict network access to XML-processing interfaces to trusted users and systems.
  • Monitor for XML parsing anomalies, sensitive file access indicators, and memory exhaustion.

Validation and detection

  • Confirm whether any deployment runs IBM InfoSphere Information Server 9.1, 11.3, 11.5, or 11.7.
  • Map which workflows accept or process XML data from users or integrations.
  • Check patch or fix status against the IBM support advisory.
  • Review access controls for accounts allowed to submit XML-processing jobs.
  • Review logs and monitoring for unusual XML errors or memory pressure.
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-2018-1727 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:L/AC:L/AV:N/C:H/I:N/PR:L/S:U/UI: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
7.1CVSS 3.0HighCVSS:3.0/A:L/AC:L/AV:N/C:H/I:N/PR:L/S:U/UI:N/E:U/RC:C/RL:O2.84.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.1High
CVSS 3.0 vector shape for CVE-2018-1727Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:L/AC:L/AV:N/C:H/I:N/PR:L/S:U/UI: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
IBMInfoSphere Information Server9.1, 11.3, 11.5, 11.7Listed
Weakness

CWE details

No CWE listed

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