Security readout for executives and security teams
Plain-English summary
Micronaut apps before 2.5.9 could let unauthenticated remote users read files outside intended directories. This is primarily a confidentiality risk: secrets, configuration, keys, or source files could be exposed if the vulnerable app is reachable. The vendor patched the issue in 2.5.9 and documented workarounds.
Executive priority
Prioritize remediation for any externally reachable Micronaut service. The issue is high severity because it can expose sensitive files without authentication, but the evidence provided does not show known active exploitation. Upgrade or apply the vendor workarounds quickly, starting with public-facing systems.
Technical view
CVE-2021-32769 is a CWE-22 path traversal flaw in micronaut-core before 2.5.9. Micronaut did not sufficiently restrict file access to configured paths, allowing traversal outside intended directories under basic configuration. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, high confidentiality impact only.
Likely exposure
Exposure is most likely in applications using micronaut-core versions earlier than 2.5.9, especially where file or static resource mappings use broad directory patterns. The provided sources do not identify affected CPEs or additional products. Non-Micronaut applications are not implicated by this source bundle.
Exploitation context
The source bundle says the issue is remotely reachable and unauthenticated under vulnerable configurations. It does not cite active exploitation, and KEV status is false. Treat internet-facing vulnerable apps as urgent because exploitation complexity is low and successful access could disclose sensitive local files.
Researcher notes
The commit and advisory are the key technical anchors. The sources identify the affected component, vulnerable version range, patch version, and workarounds, but do not provide CPEs, exploit-in-the-wild evidence, or broader product impact. Keep validation focused on dependency version and file-mapping behavior.
Mitigation direction
- Upgrade micronaut-core to version 2.5.9 or later.
- Remove broad `**` mappings where file access is exposed.
- Use only `*` mappings to expose flat directory structures.
- On Linux, consider chroot isolation if immediate upgrade is blocked.
- Check Micronaut vendor guidance for any environment-specific hardening.
Validation and detection
- Inventory applications and dependency locks for micronaut-core versions below 2.5.9.
- Review exposed file or static resource mappings for `**` patterns.
- Confirm deployed artifacts use micronaut-core 2.5.9 or later.
- Verify file-serving routes cannot access files outside intended directories.
- Review access logs for suspicious path traversal probes.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32769 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-cjx7-399x-p2rjCVE reference · x_refsource_CONFIRM
- https://github.com/micronaut-projects/micronaut-core/commit/a0cfeb13bf1ef5d692d16d4a3b91b34b7456bb11CVE 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.