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CVE Record

CVE-2020-13358: A vulnerability in the internal Kubernetes agent api in GitLab CE/EE version 13.3 and above allows unauthor...

A vulnerability in the internal Kubernetes agent api in GitLab CE/EE version 13.3 and above allows unauthorized access to private projects. Affected versions are: >=13.4, <13.4.5,>=13.3, <13.3.9,>=13.5, <13.5.2.

MediumCVSS 4.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

GitLab CE/EE versions in the 13.3, 13.4, and 13.5 lines had a flaw in the internal Kubernetes agent API that could let an unauthorized user access private projects. The business impact is primarily confidentiality exposure, not service outage or data tampering, based on the supplied CVSS vector.

Executive priority

Schedule remediation in normal vulnerability cycles, with faster handling for GitLab instances containing sensitive code, customer data, or regulated projects. There is meaningful confidentiality risk, but the supplied evidence does not support emergency treatment for broad active exploitation.

Technical view

CVE-2020-13358 affects GitLab CE/EE >=13.3 <13.3.9, >=13.4 <13.4.5, and >=13.5 <13.5.2. The issue is in the internal Kubernetes agent API and allows unauthorized access to private projects. CVSS 3.1 is 4.7 with local attack vector, high complexity, low privileges required, and high confidentiality impact.

Likely exposure

Exposure is most likely for self-managed GitLab CE/EE deployments running the listed 13.3, 13.4, or 13.5 affected versions. The source bundle does not identify affected configurations beyond the internal Kubernetes agent API, so validate version and feature usage before scoping impact.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. CVSS indicates exploitation requires local access, low privileges, and high attack complexity. Treat this as a private-project data exposure risk rather than a remote unauthenticated takeover.

Researcher notes

Key unknowns are practical exploitability details, required local context, and exact operational preconditions for the internal Kubernetes agent API path. The CVSS vector supports constrained exploitation, while the impact statement supports high confidentiality concern for private repositories.

Mitigation direction

  • Upgrade GitLab CE/EE outside the affected version ranges.
  • Use vendor guidance for the correct fixed release path.
  • Prioritize systems hosting sensitive private projects.
  • Review Kubernetes agent API exposure and access assumptions.
  • Restrict GitLab access to trusted users where upgrade is pending.

Validation and detection

  • Inventory GitLab CE/EE version on every deployment.
  • Flag versions >=13.3 <13.3.9, >=13.4 <13.4.5, and >=13.5 <13.5.2.
  • Confirm whether private projects exist on affected instances.
  • Review access logs for unexpected private project access.
  • Document remediation status for each affected GitLab instance.
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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description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2020-13358 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
4.7 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A: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
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
4.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N13.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.7Medium
CVSS 3.1 vector shape for CVE-2020-13358Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A: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
GitLabGitlab CE/EE>=13.4, <13.4.5, >=13.3, <13.3.9, >=13.5, <13.5.2Listed
Weakness

CWE details

No CWE listed

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