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CVE Record

CVE-2019-6159: A stored cross-site scripting (XSS) vulnerability exists in various firmware versions of the legacy IBM Sys...

A stored cross-site scripting (XSS) vulnerability exists in various firmware versions of the legacy IBM System x IMM (IMM v1) embedded Baseboard Management Controller (BMC). This vulnerability could allow an unauthenticated user to cause JavaScript code to be stored in the IMM log which may then be executed in the user's web browser when IMM log records containing the JavaScript code are viewed. The JavaScript code is not executed on IMM itself. The later IMM2 (IMM v2) is not affected.

CriticalCVSS 9.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2019-6159 affects legacy IBM System x IMM v1 BMC firmware. An unauthenticated attacker could store JavaScript in IMM logs, which may execute in an administrator's browser when those logs are viewed. IMM2 is not affected. The issue is critical because BMC interfaces are highly privileged management planes.

Executive priority

Treat this as a high-priority legacy infrastructure risk. BMC compromise paths can affect server control and incident response, even though this issue executes in a browser. Prioritize exposed IMM v1 systems first.

Technical view

This is stored XSS in legacy IBM System x IMM v1 firmware logs. The injected JavaScript is stored in IMM log records and runs in the viewer's browser, not on IMM itself. CVSS 3.0 is 9.6 with network attack vector, low complexity, no privileges, required user interaction, and changed scope.

Likely exposure

Exposure is likely limited to organizations still operating legacy IBM System x servers with IMM v1 firmware, especially where BMC web interfaces are reachable beyond tightly controlled management networks.

Exploitation context

The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. Practical abuse would depend on reaching IMM v1 and having a user view affected log records in the web interface.

Researcher notes

Evidence confirms stored XSS, unauthenticated log injection, browser-side execution on log viewing, and IMM2 non-impact. The provided sources do not include exploit activity, detailed affected version ranges, or explicit fixed firmware details.

Mitigation direction

  • Identify systems running legacy IBM System x IMM v1 firmware.
  • Review Lenovo advisory LEN-24785 for affected firmware and vendor remediation.
  • Apply vendor-provided firmware updates if listed for the deployed model.
  • Restrict IMM web access to trusted management networks or VPN only.
  • Plan replacement or migration from legacy IMM v1 where support is limited.

Validation and detection

  • Inventory BMC firmware and confirm IMM v1 versus unaffected IMM2.
  • Compare installed firmware versions against Lenovo advisory LEN-24785.
  • Check whether IMM web interfaces are exposed outside management networks.
  • Verify vendor remediation was applied and documented.
  • Review access controls for administrators who view IMM logs.
Prepared
Confidence
medium
Sources
3

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-2019-6159 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.6 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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
2Source 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
9.6CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H2.86Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

9.6Critical
CVSS 3.0 vector shape for CVE-2019-6159Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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
IBMlegacy System x IMM (IMM v1) firmwarevariousListed
Weakness

CWE details

No CWE listed

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