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CVE Record

CVE-2021-29771: IBM InfoSphere Information Server 11.7 is vulnerable to cross-site scripting.

IBM InfoSphere Information Server 11.7 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.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM InfoSphere Information Server 11.7 has a web-interface cross-site scripting issue. A logged-in user could place JavaScript into the UI, which may run in another trusted session and expose credentials or alter displayed functionality.

Executive priority

Treat this as a moderate-priority remediation for affected IBM data integration environments. It is not documented as actively exploited here, but credential exposure inside trusted sessions can create downstream business risk.

Technical view

The CVSS 3.0 vector is 5.4 medium: network reachable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact. The provided sources identify IBM InfoSphere Information Server 11.7 only.

Likely exposure

Exposure is likely limited to organizations running IBM InfoSphere Information Server 11.7 with users able to access and enter content in its Web UI.

Exploitation context

The bundle does not show CISA KEV listing or active exploitation evidence. The weakness requires an authenticated user and victim interaction inside a trusted web session.

Researcher notes

Evidence is narrow: IBM InfoSphere Information Server 11.7 is the only affected product named. No CWE is provided in the bundle. Do not broaden scope beyond IBM guidance without additional vendor evidence.

Mitigation direction

  • Review IBM advisory 6509614 for the official fix or workaround.
  • Apply IBM-recommended maintenance for InfoSphere Information Server 11.7.
  • Restrict Web UI access to trusted networks and required users.
  • Limit low-privilege accounts that can create or modify UI content.
  • Increase monitoring for suspicious script-like content in application fields.

Validation and detection

  • Inventory IBM InfoSphere Information Server deployments and confirm version 11.7 exposure.
  • Check whether IBM-recommended fixes from advisory 6509614 are applied.
  • Review roles allowed to submit or modify Web UI content.
  • Inspect logs and stored UI content for suspicious JavaScript-like entries.
  • Run only authorized, non-destructive XSS validation in a test environment.
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-2021-29771 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.0)
Known Exploited
No
Published

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

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
5.4CVSS 3.0MediumCVSS:3.0/AV:N/S:C/AC:L/A:N/UI:R/C:L/PR:L/I:L/RL:O/E:H/RC:C2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2021-29771Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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 Server11.7Listed
Weakness

CWE details

No CWE listed

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