Security readout for executives and security teams
Plain-English summary
CVE-2017-20181 is a path traversal issue in the Android app hgzojer Vocable Trainer through version 1.3.0. A local attacker with low privileges could potentially access or modify app-related data outside intended paths. Business impact is limited to devices running the affected app, but privacy and data integrity may be affected.
Executive priority
Handle as a moderate mobile application remediation item. It should not displace internet-facing critical fixes, but affected managed devices should be upgraded or cleaned up because local data exposure and tampering are plausible.
Technical view
The vulnerability is CWE-22 in src/at/hgz/vocabletrainer/VocableTrainerProvider.java. Sources describe local attack requirements, low privileges, no user interaction, and low confidentiality, integrity, and availability impact. Version 1.3.1 and commit accf6838078f8eb105cfc7865aba5c705fb68426 are identified as the fix.
Likely exposure
Exposure is likely narrow: Android devices with hgzojer Vocable Trainer versions 1.0, 1.1, 1.2, or 1.3 installed. Server infrastructure is not implicated by the provided sources.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. Sources require local access and low privileges. The bundle does not provide evidence of active exploitation, public exploit availability, or remote attack paths.
Researcher notes
Evidence does not specify the exact provider exposure, file targets, or Android permission boundaries. Validate implementation details against the referenced patch and release before writing detections or assessing compensating controls.
Mitigation direction
- Upgrade hgzojer Vocable Trainer to version 1.3.1 or later.
- Prioritize managed Android devices where the app is installed.
- Check vendor release and patch references before approving exceptions.
- Remove the app where upgrading is not possible or business need is absent.
Validation and detection
- Inventory Android devices for hgzojer Vocable Trainer installations.
- Confirm installed versions are not 1.0, 1.1, 1.2, or 1.3.
- Verify the deployed build includes the referenced patch commit.
- Document any devices where update or removal cannot be completed.
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-2017-20181 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L1.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://vuldb.com/?id.222328CVE reference · vdb-entry, technical-description
- https://vuldb.com/?ctiid.222328CVE reference · signature, permissions-required
- https://github.com/hgzojer/vocabletrainer/commit/accf6838078f8eb105cfc7865aba5c705fb68426CVE reference · patch
- https://github.com/hgzojer/vocabletrainer/releases/tag/v1.3.1CVE reference · patch
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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.