CWE-939 (Improper Authorization in Handler for Custom URL Scheme) documents a weakness type used across vulnerability databases and security assessments. Use the sections below for definition, context, and mapped CVEs.
The product uses a handler for a custom URL scheme, but it does not properly restrict which actors can invoke the handler using the scheme.
| Kind | Name | Class | Prevalence | OS / CPE |
|---|---|---|---|---|
| technology | — | Mobile | Undetermined | — |
These CVEs are mapped to this weakness in this database and kept for traceability and search.
| CVE | Published | Summary |
|---|---|---|
| CVE-2026-3471 | 2026-05-18 | Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in the Mattermost Desktop App which allows a malicious server owner to repeated cras… |
| CVE-2026-35394 | 2026-04-06 | Mobile Next is an MCP server for mobile development and automation. Prior to 0.0.50, the mobile_open_url tool in mobile-mcp passes user-supplied URLs directly to Android's intent system without any sc… |
| CVE-2026-33335 | 2026-03-24 | Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, the Vikunja Desktop Electron wrapper passes URLs from `window.open()` calls direc… |
| CVE-2026-26123 | 2026-03-10 | Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally. |
| CVE-2026-1046 | 2026-02-16 | Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on… |
| CVE-2025-67739 | 2025-12-11 | In JetBrains TeamCity before 2025.11.2 improper repository URL validation could lead to local paths disclosure |
| CVE-2025-41408 | 2025-09-05 | Improper authorization in handler for custom URL scheme issue in "Yahoo! Shopping" App for Android versions prior to 14.15.0 allows a remote unauthenticated attacker may lead a user to access an arbit… |
| CVE-2025-5020 | 2025-05-21 | Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox … |
| CVE-2024-54125 | 2024-12-17 | Improper authorization in handler for custom URL scheme issue in "Shonen Jump+" App for Android versions prior to 4.0.0 allows an attacker to lead a user to access an arbitrary website via the vulnera… |
| CVE-2024-54014 | 2024-12-05 | Improper authorization in handler for custom URL scheme issue in 'Skylark' App for Android 6.2.13 and earlier and 'Skylark' App for iOS 6.2.13 and earlier allows an attacker to lead the application to… |
| CVE-2024-45203 | 2024-09-09 | Improper authorization in handler for custom URL scheme issue in "@cosme" App for Android versions prior 5.69.0 and "@cosme" App for iOS versions prior to 6.74.0 allows an attacker to lead a user to a… |
| CVE-2024-41918 | 2024-08-29 | 'Rakuten Ichiba App' for Android 12.4.0 and earlier and 'Rakuten Ichiba App' for iOS 11.7.0 and earlier are vulnerable to improper authorization in handler for custom URL scheme. An arbitrary site may… |
| CVE-2024-35298 | 2024-06-19 | Improper authorization in handler for custom URL scheme issue in 'ZOZOTOWN' App for Android versions prior to 7.39.6 allows an attacker to lead a user to access an arbitrary website via another applic… |
| CVE-2024-33606 | 2024-06-11 | An attacker could retrieve sensitive files (medical images) as well as plant new medical images or overwrite existing medical images on a MicroDicom DICOM Viewer system. User interaction is required t… |
| CVE-2023-43582 | 2023-11-15 | Improper authorization in some Zoom clients may allow an authorized user to conduct an escalation of privilege via network access. |
| CVE-2022-20736 | 2022-06-15 | A vulnerability in the web-based management interface of Cisco AppDynamics Controller Software could allow an unauthenticated, remote attacker to access a configuration file and the login page for an … |
| CVE-2021-31384 | 2021-10-19 | Due to a Missing Authorization weakness and Insufficient Granularity of Access Control in a specific device configuration, a vulnerability exists in Juniper Networks Junos OS on SRX Series whereby an … |
| CVE-2020-11000 | 2020-04-08 | GreenBrowser before version 1.2 has a vulnerability where apps that rely on URL Parsing to verify that a given URL is pointing to a trust server may be susceptible to many different ways to get URL pa… |
| Date | Name | Version | Importance | Comment |
|---|---|---|---|---|
| 2017-01-19 | CWE Content Team | 2.10 | — | updated Relationships |
| 2017-11-08 | CWE Content Team | 3.0 | — | updated Modes_of_Introduction, References, Relationships |
| 2020-02-24 | CWE Content Team | 4.0 | — | updated Applicable_Platforms, Relationships |
| 2020-06-25 | CWE Content Team | 4.1 | — | updated Potential_Mitigations |
| 2021-03-15 | CWE Content Team | 4.4 | — | updated Demonstrative_Examples |
| 2023-01-31 | CWE Content Team | 4.10 | — | updated Description |
| 2023-04-27 | CWE Content Team | 4.11 | — | updated References, Relationships |
| 2023-06-29 | CWE Content Team | 4.12 | — | updated Mapping_Notes |
| 2025-04-03 | CWE Content Team | 4.17 | — | updated Demonstrative_Examples |
| 2025-12-11 | CWE Content Team | 4.19 | — | updated Common_Consequences, Detection_Factors, Relationships, Weakness_Ordinalities |