Security readout for executives and security teams
Plain-English summary
Mender Enterprise had a logout weakness where a user could continue using an existing JWT after logging out, when JWT verification caching was enabled. This undermines session termination and can extend access longer than administrators expect.
Executive priority
Prioritize remediation where Mender Enterprise manages sensitive device fleets or privileged users. The main business risk is stale authenticated access persisting after logout, not confirmed remote unauthenticated compromise.
Technical view
CVE-2021-35342 affects useradm service 1.14.0 in Mender Enterprise 2.7.x before 2.7.1 and 1.13.0 in 2.6.x before 2.6.1. The flaw is missing JWT invalidation after logout when JWT verification cache is enabled.
Likely exposure
Exposure appears limited to Northern.tech Mender Enterprise 2.6.x and 2.7.x deployments using the affected useradm versions, specifically where JWT verification cache is enabled.
Exploitation context
The bundle does not cite active exploitation, KEV listing, public exploit code, or exploit maturity. Abuse appears to require possession of a valid JWT that remains accepted after logout.
Researcher notes
Severity, CVSS, CWE, and CPE data are absent in the supplied bundle. Analysis is based on the CVE description and referenced Mender advisory metadata only.
Mitigation direction
- Upgrade Mender Enterprise 2.7.x to version 2.7.1 or later.
- Upgrade Mender Enterprise 2.6.x to version 2.6.1 or later.
- Confirm whether JWT verification cache is enabled in affected deployments.
- Review Northern.tech or Mender guidance before changing authentication cache behavior.
Validation and detection
- Inventory Mender Enterprise version and useradm service version.
- Check whether JWT verification cache is enabled.
- Confirm logout invalidates access on patched systems.
- Review authentication logs for JWT use after logout events.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-35342 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://northern.tech/our-productsCVE reference · x_refsource_MISC
- https://mender.io/blog/cve-2021-35342-useradm-logout-vulnerabililtyCVE reference · x_refsource_MISC
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.