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CVE Record

CVE-2016-4858: Cross-site scripting vulnerability in Splunk Enterprise 6.4.x prior to 6.4.2, Splunk Enterprise 6.3.x prior...

Cross-site scripting vulnerability in Splunk Enterprise 6.4.x prior to 6.4.2, Splunk Enterprise 6.3.x prior to 6.3.6, Splunk Enterprise 6.2.x prior to 6.2.10, Splunk Enterprise 6.1.x prior to 6.1.11, Splunk Enterprise 6.0.x prior to 6.0.12, Splunk Enterprise 5.0.x prior to 5.0.16 and Splunk Light prior to 6.4.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2016-4858 is a cross-site scripting issue in older Splunk Enterprise and Splunk Light releases. An attacker could inject web script or HTML through unspecified vectors. The available sources do not provide CVSS scoring, prerequisites, or exploit details, so urgency depends on whether affected Splunk web interfaces remain deployed.

Executive priority

Treat this as a remediation check for legacy Splunk estates. It is not listed as KEV in the provided bundle, but Splunk often holds sensitive operational data, so unpatched web interfaces should not remain exposed.

Technical view

Splunk Enterprise 5.0.x through 6.4.x before the listed fixed releases, and Splunk Light before 6.4.2, are affected. The vulnerability permits remote script or HTML injection via unspecified vectors. The source bundle does not name the affected endpoint, authentication requirements, or a CWE.

Likely exposure

Exposure is most likely in organizations still running legacy Splunk Enterprise or Splunk Light versions. Internet-reachable or broadly accessible Splunk web interfaces raise concern, especially where privileged users regularly access the interface.

Exploitation context

The bundle does not show CISA KEV inclusion or cited evidence of active exploitation. It only states that remote attackers may inject arbitrary web script or HTML through unspecified vectors, leaving exploitability conditions unclear.

Researcher notes

Key gaps are the unspecified attack vector, absent CVSS score, absent CWE, and no exploit-status evidence. Validation should focus on version confirmation, interface exposure, and whether any compensating access controls reduce practical reachability.

Mitigation direction

  • Upgrade Splunk Enterprise to the fixed release for the deployed branch or later.
  • Upgrade Splunk Light to 6.4.2 or later if still in use.
  • Review Splunk advisory SP-CAAAPN9 and JVN#71462075 for vendor-specific guidance.
  • Restrict access to Splunk web interfaces until remediation is confirmed.
  • Retire unsupported legacy Splunk instances where upgrades are not practical.

Validation and detection

  • Inventory Splunk Enterprise and Splunk Light versions across all environments.
  • Confirm deployed versions meet or exceed the fixed versions listed in the advisory.
  • Check whether Splunk web interfaces are internet-facing or broadly reachable internally.
  • Review change records to verify the relevant Splunk upgrade was completed.
  • Monitor Splunk advisories for any additional vendor clarification.
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-2016-4858 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Splunk Inc.Splunk Enterprise6.4.x prior to 6.4.2, 6.3.x prior to 6.3.6, 6.2.x prior to 6.2.10, 6.1.x prior to 6.1.11, 6.0.x prior to 6.0.12, 5.0.x prior to 5.0.16Listed
Splunk Inc.Splunk Lightprior to 6.4.2Listed
Weakness

CWE details

No CWE listed

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