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CVE Record

CVE-2018-1521: IBM Rational Team Concert 5.0 through 5.0.2 and 6.0 through 6.0.5 are vulnerable to cross-site scripting.

IBM Rational Team Concert 5.0 through 5.0.2 and 6.0 through 6.0.5 are 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: 141802.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a cross-site scripting issue in IBM Rational Team Concert. An attacker with some access could place JavaScript into the Web UI, then rely on a user session to run it. The business concern is exposure of credentials or session data inside a trusted development collaboration tool.

Executive priority

Treat as a moderate-priority remediation item. It is not marked KEV in the provided data, but affected systems can handle sensitive development workflows and credentials, making timely patch validation important.

Technical view

CVE-2018-1521 affects IBM Rational Team Concert 5.0 through 5.0.2 and 6.0 through 6.0.5. The CVSS 3.0 score is 5.4. The vector indicates network access, low complexity, low privileges required, user interaction required, changed scope, and low confidentiality and integrity impact.

Likely exposure

Exposure is likely limited to organizations running the listed IBM Rational Team Concert versions with Web UI access. Risk is higher where untrusted or broad user populations can create content rendered in other users' sessions.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector includes high exploit-code maturity, but that does not by itself prove current real-world exploitation.

Researcher notes

The provided data identifies XSS impact and affected versions but does not include CWE, exact vulnerable parameter, exploit path, or fixed version details. Validate using vendor guidance and avoid assuming other IBM products are affected.

Mitigation direction

  • Identify IBM Rational Team Concert instances and versions.
  • Review IBM advisory 10716507 for supported fixed levels or vendor guidance.
  • Apply IBM-provided updates or mitigations where applicable.
  • Restrict Web UI access to trusted users until remediation is complete.
  • Monitor for suspicious script-like content in user-controlled fields.

Validation and detection

  • Confirm deployed Rational Team Concert versions against affected ranges.
  • Check whether IBM advisory fixes have been applied.
  • Review access controls for users who can submit Web UI content.
  • Inspect logs or audit trails for suspicious content changes.
  • Verify browsers no longer execute injected script in remediated test cases.
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-2018-1521 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/A:N/AC:L/AV:N/C:L/I:L/PR:L/S:C/UI:R/E:H/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
5.4CVSS 3.0MediumCVSS:3.0/A:N/AC:L/AV:N/C:L/I:L/PR:L/S:C/UI:R/E:H/RC:C/RL:O2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.4Medium
CVSS 3.0 vector shape for CVE-2018-1521Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/A:N/AC:L/AV:N/C:L/I:L/PR:L/S:C/UI:R/E:H/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
IBMRational Team Concert5.0, 5.0.2, 5.0.1, 6.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5Listed
Weakness

CWE details

No CWE listed

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