Security readout for executives and security teams
Plain-English summary
Rancher could expose sensitive credentials in plaintext to authenticated users with common cluster, project, or base-user roles. This turns ordinary account access into a potential compromise of secrets used by managed Kubernetes environments.
Executive priority
Treat this as urgent for any Rancher-managed Kubernetes environment. Authenticated exposure of plaintext credentials can create wider compromise beyond Rancher itself, so upgrade and credential-risk review should be prioritized.
Technical view
CVE-2021-36782 is CWE-312 cleartext storage of sensitive information in SUSE Rancher. Affected versions are Rancher before 2.5.16 and before 2.6.7. Authenticated users could retrieve plaintext sensitive data through the Rancher API and Kubernetes API objects under cluster.management.cattle.io.
Likely exposure
Organizations running Rancher versions before 2.5.16 or 2.6.7 are potentially exposed, especially where many users have Cluster, Project, or User Base access. Exposure requires authentication, but the affected role set is broad.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The risk is still high because low-privileged authenticated access could expose credentials with downstream confidentiality, integrity, and availability impact.
Researcher notes
Evidence identifies plaintext credential exposure through Rancher API and cluster.management.cattle.io objects, but the source bundle does not enumerate exact fields, logs, or exploit tooling. Avoid assuming public exploitation without additional evidence.
Mitigation direction
- Upgrade Rancher to 2.5.16, 2.6.7, or later supported releases.
- Review the Rancher advisory and SUSE Bugzilla for version-specific guidance.
- Reduce Rancher cluster and project membership to least privilege.
- Assess whether exposed credentials require rotation after remediation.
- Monitor Rancher and Kubernetes API access for unusual secret-related activity.
Validation and detection
- Inventory all Rancher deployments and record exact running versions.
- Confirm no production deployment runs Rancher before 2.5.16 or 2.6.7.
- Review user roles for Cluster Owner, Cluster Member, Project Owner, Project Member, and User Base.
- Validate remediation in a controlled environment using non-production secrets only.
- Check audit logs for unexpected authenticated access to affected management objects.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
CWE-312: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer 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 lookupCVE-2021-36782 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.suse.com/show_bug.cgi?id=1193988CVE reference · x_refsource_CONFIRM
- https://github.com/rancher/rancher/security/advisories/GHSA-g7j7-h4q8-8w2fCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Cleartext Storage of Sensitive Information
Cleartext Storage of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.