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CVE Record

CVE-2021-20386: IBM Security Guardium 11.2 is vulnerable to cross-site scripting.

IBM Security Guardium 11.2 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 195767.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Security Guardium 11.2 has a cross-site scripting issue in its Web UI. An attacker could cause JavaScript to run in a trusted browser session, potentially changing UI behavior and exposing credentials. The available sources rate this as medium severity, not a confirmed active-exploitation emergency.

Executive priority

Treat as a moderate-priority remediation item for Guardium environments. Prioritize faster if the Web UI is broadly reachable or used by privileged administrators.

Technical view

CVE-2021-20386 is a network-reachable XSS vulnerability in IBM Security Guardium 11.2. The CVSS 3.0 score is 6.1, with low attack complexity, required user interaction, changed scope, and low confidentiality and integrity impact. No CWE is listed in the supplied record.

Likely exposure

Exposure is most likely where IBM Security Guardium 11.2 Web UI is reachable by users or administrators, especially over broad internal networks or internet-facing paths.

Exploitation context

The bundle does not identify CISA KEV listing or active exploitation. The CVSS vector includes exploit maturity marked high, but the provided sources do not give exploit details or prove current attacks.

Researcher notes

The record supports XSS impact against trusted Web UI sessions and possible credential disclosure. Evidence is limited to IBM and CVE metadata; no public exploit steps, affected subcomponents, or detailed remediation versions are included in the supplied bundle.

Mitigation direction

  • Review IBM advisory node 6455281 for official fixes or interim guidance.
  • Apply IBM-provided updates or configuration changes per vendor instructions.
  • Limit Guardium Web UI access to trusted administrative networks.
  • Enforce MFA and session controls for Guardium administrators.
  • Monitor for suspicious Web UI activity and credential misuse.

Validation and detection

  • Inventory IBM Security Guardium deployments and confirm version 11.2 presence.
  • Identify all networks and users with Web UI access.
  • Check remediation status against IBM support advisory node 6455281.
  • Review authentication logs for unusual administrator session activity.
  • Confirm browser-side security controls do not replace vendor 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.

ATT&CK lookup starting points

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CVE-2021-20386 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
Medium
CVSS
6.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/A:N/PR:N/AV:N/C:L/UI:R/I:L/S:C/AC:L/RC:C/RL:O/E: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
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
6.1CVSS 3.0MediumCVSS:3.0/A:N/PR:N/AV:N/C:L/UI:R/I:L/S:C/AC:L/RC:C/RL:O/E:H2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.1Medium
CVSS 3.0 vector shape for CVE-2021-20386Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:N/PR:N/AV:N/C:L/UI:R/I:L/S:C/AC:L/RC:C/RL:O/E: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
IBMSecurity Guardium11.2Listed
Weakness

CWE details

No CWE listed

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