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CVE-2021-38616: In Eigen NLP 3.10.1, a lack of access control on the /auth/v1/user/{user-guid}/ user edition endpoint could...

In Eigen NLP 3.10.1, a lack of access control on the /auth/v1/user/{user-guid}/ user edition endpoint could permit any logged-in user to increase their own permissions via a user_permissions array in a PATCH request. A guest user could modify other users' profiles and much more.

HighCVSS 7.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Eigen NLP 3.10.1 allowed logged-in users to change permissions through a user-edit endpoint without proper access control. A guest account could reportedly modify other users' profiles and potentially elevate privileges, making this a business risk where the product is deployed with shared or external user access.

Executive priority

Treat as high priority if Eigen NLP 3.10.1 is used with multiple users, guests, or external access. The issue can undermine role separation and administrative trust, but urgency depends on confirmed deployment because source metadata does not identify broad affected product ranges.

Technical view

CVE-2021-38616 is an improper access-control issue in the Eigen NLP 3.10.1 /auth/v1/user/{user-guid}/ user edition endpoint. The source description says a PATCH request containing a user_permissions array could let authenticated users increase their own permissions. CVSS 3.1 is 7.6, with network access, low privileges, and no user interaction required.

Likely exposure

Exposure appears limited to environments running Eigen NLP 3.10.1, especially where guest or low-privilege accounts can authenticate. The provided affected CPE metadata is nonspecific, so confirm product and version from local inventory rather than assuming broader Eigen deployments are affected.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. The risk is still meaningful because exploitation requires only authenticated low-privilege access and targets authorization controls around user management.

Researcher notes

The strongest evidence is the CVE description: missing access control on a user edition endpoint and privilege modification through user_permissions. Patch details, CWE mapping, exact fixed versions, and exploitation reports are not present in the supplied bundle. Validation should focus on authorization behavior and audit evidence, not payload development.

Mitigation direction

  • Identify any Eigen NLP 3.10.1 instances and prioritize them for review.
  • Check Eigen and Excellium/Thales advisory guidance for fixed versions or vendor mitigations.
  • Restrict access to user-management APIs to trusted networks while remediation is assessed.
  • Disable or tightly limit guest accounts where business operations allow.
  • Review role and permission assignments for unauthorized changes.

Validation and detection

  • Confirm whether Eigen NLP 3.10.1 exists in asset inventory.
  • Review logs for unexpected user profile or permission changes.
  • Check for requests touching /auth/v1/user/ endpoints from low-privilege accounts.
  • Verify authorization rules prevent users from editing other users or their own roles.
  • Compare deployed version and configuration against vendor advisory guidance.
Prepared
Confidence
medium
Sources
5

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-2021-38616 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AC:L/AV:N/A:L/C:L/I:H/PR:L/S:U/UI:N

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
5Source 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
7.6CVSS 3.1HighCVSS:3.1/AC:L/AV:N/A:L/C:L/I:H/PR:L/S:U/UI:N2.84.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.6High
CVSS 3.1 vector shape for CVE-2021-38616Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AC:L/AV:N/A:L/C:L/I:H/PR:L/S:U/UI:N

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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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