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CVE Record

CVE-2021-20585: IBM Security Verify Access 20.07 could disclose sensitive information in HTTP server headers that could be...

IBM Security Verify Access 20.07 could disclose sensitive information in HTTP server headers that could be used in further attacks against the system. IBM X-Force ID: 199398.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Security Verify Access 20.07 can leak sensitive details through HTTP server headers. That information may help attackers profile the system and plan follow-on attacks. The issue is moderate severity because it is remotely observable without authentication, but the reported impact is limited to confidentiality.

Executive priority

Treat this as a moderate-priority hardening and exposure-reduction item. It should not displace actively exploited critical issues, but internet-facing identity access infrastructure warrants timely remediation and verification.

Technical view

CVE-2021-20585 is an information disclosure issue in IBM Security Verify Access 20.07. The CVSS 3.0 score is 5.3, with network access, low complexity, no privileges, no user interaction, low confidentiality impact, and no integrity or availability impact.

Likely exposure

Exposure is most relevant where IBM Security Verify Access 20.07 HTTP services are reachable by users, partners, or the internet. The source bundle does not identify other affected versions or products.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. The CVSS temporal vector lists exploit maturity as unproven. The realistic risk is reconnaissance value that supports later attacks, not direct system compromise from this CVE alone.

Researcher notes

The evidence supports a header-based information disclosure in IBM Security Verify Access 20.07 only. Do not broaden affected versions without vendor confirmation. Useful research focus is asset inventory, header exposure validation, and correlation with IBM X-Force ID 199398.

Mitigation direction

  • Identify all IBM Security Verify Access 20.07 deployments.
  • Review IBM advisory guidance for the supported fix or configuration change.
  • Apply IBM-supported remediation after testing in a staging environment.
  • Restrict unnecessary external access to management or sensitive HTTP endpoints.
  • Review header exposure at proxies and gateways after remediation.

Validation and detection

  • Confirm whether any deployed instance runs IBM Security Verify Access 20.07.
  • Inspect HTTP responses for sensitive server header disclosure.
  • Compare observed behavior with IBM advisory expectations after remediation.
  • Verify no unsupported affected systems remain exposed.
  • Document compensating controls for systems awaiting IBM remediation.
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-2021-20585 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
5.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/S:U/C:L/PR:N/AV:N/AC:L/I:N/A:N/UI:N/E:U/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
5.3CVSS 3.0MediumCVSS:3.0/S:U/C:L/PR:N/AV:N/AC:L/I:N/A:N/UI:N/E:U/RC:C/RL:O3.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.3Medium
CVSS 3.0 vector shape for CVE-2021-20585Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/S:U/C:L/PR:N/AV:N/AC:L/I:N/A:N/UI:N/E:U/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
IBMSecurity Verify Access20.07Listed
Weakness

CWE details

No CWE listed

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