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CVE Record

CVE-2021-20355: IBM Jazz Team Server 6.0.6, 6.0.6.1, 7.0, 7.0.1, and 7.0.2 could allow a remote attacker to obtain sensitiv...

IBM Jazz Team Server 6.0.6, 6.0.6.1, 7.0, 7.0.1, and 7.0.2 could allow a remote attacker to obtain sensitive information, caused by the failure to set the HTTPOnly flag. A remote attacker could exploit this vulnerability to obtain sensitive information from the cookie. IBM X-Force ID: 194891.

LowCVSS 3.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

IBM Jazz Team Server stores at least one sensitive cookie without the HTTPOnly protection in affected versions. That can let a remote attacker obtain cookie information under difficult conditions. Business impact is limited confidentiality exposure, not direct service outage or data modification.

Executive priority

Treat as a low-priority but real confidentiality hygiene issue. Remediate during normal maintenance unless the server is externally exposed or handles highly sensitive project data.

Technical view

CVE-2021-20355 affects IBM Jazz Team Server 6.0.6, 6.0.6.1, 7.0, 7.0.1, and 7.0.2. The issue is missing HTTPOnly on a sensitive cookie. CVSS 3.0 is 3.7 with network access, no privileges, no user interaction, high attack complexity, and low confidentiality impact.

Likely exposure

Exposure is likely limited to organizations running the listed IBM Jazz Team Server versions, especially where the application is reachable by untrusted networks or browsers handling sensitive sessions.

Exploitation context

The provided bundle does not show CISA KEV listing or active exploitation. IBM X-Force lists exploit maturity as unproven. The exact exploitation prerequisite is not detailed beyond high attack complexity.

Researcher notes

Do not assume broader IBM product impact beyond Jazz Team Server versions named in the bundle. The sources do not provide exploit details or a standalone workaround. Validation should focus on version exposure and cookie attributes.

Mitigation direction

  • Inventory IBM Jazz Team Server deployments and confirm affected versions.
  • Review IBM advisory 6597583 for official remediation and fixed levels.
  • Apply IBM-recommended updates or fixes where applicable.
  • Limit external access to Jazz Team Server until remediated.
  • Review session cookie handling for HTTPOnly on sensitive cookies.

Validation and detection

  • Confirm the installed Jazz Team Server version against the affected list.
  • Check authenticated HTTP responses for sensitive cookies missing HTTPOnly.
  • Verify remediation using IBM advisory guidance after patching.
  • Review vulnerability scanner results for CVE-2021-20355 on Jazz endpoints.
  • Document whether affected servers are internet-facing or internal only.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2021-20355 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
Low
CVSS
3.7 (3.0)
Known Exploited
No
Published

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

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
3.7CVSS 3.0LowCVSS:3.0/I:N/C:L/AV:N/UI:N/S:U/AC:H/A:N/PR:N/RL:O/RC:C/E:U2.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

3.7Low
CVSS 3.0 vector shape for CVE-2021-20355Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
IBMJazz Team Server6.0.6, 6.0.6.1, 7.0, 7.0.1, 7.0.2Listed
Weakness

CWE details

No CWE listed

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