Weakness (CWE)
CWE-942: Permissive Cross-domain Security Policy with Untrusted Domains
The product uses a web-client protection
mechanism such as a Content Security Policy (CSP) or
cross-domain policy file, but the policy includes untrusted
domains with which the web client is allowed to
communicate.
How to prevent it (3 mitigations)
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Architecture and Design, Operation
Define a restrictive Content Security Policy [REF-1486] or cross-domain policy file.
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Architecture and Design, Operation
Avoid using wildcards in the CSP / cross-domain policy file. Any domain matching the wildcard expression will be implicitly trusted, and can perform two-way interaction with the target server.
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Architecture and Design, Operation
For Flash, modify crossdomain.xml to use meta-policy options such as 'master-only' or 'none' to reduce the possibility of an attacker planting extraneous cross-domain policy files on a server.
Source: MITRE CWE-942
61 results · Clear filters · Feed
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High 8.8
A permissive cross-domain policy vulnerability has been identified in the SonicOS management interface, which in specif…
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High 8.8
Transmission 4.0.0 before 4.1.3 Permissive CORS Leaks RPC Anti-CSRF Token
Transmission 4.0.0 before 4.1.3 contains a permissive CORS vulnerability in handle_request() in rpc-server.cc that exposes the X-Transmission-Session-Id anti-CSRF token to any web origin. Malicious web pages can read the token from the 409 handshake response …
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High 7.2
Cross-Site WebSocket Hijacking and Permissive CORS in Google Agent Development Kit (ADK) for Java Development Server
Missing Origin Validation in WebSockets (CWE-1385) and Permissive Cross-domain Policy with Untrusted Domains (CWE-942) in the development web server (ADK Web) in Google Agent Development Kit (ADK) for Java (com.google.adk:google-adk-dev versions 0.1.0 before …
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High 7.1
LoopX serve-status permissive CORS policy exposes control-plane state and private Markdown files
Open and provider-neutral, LoopX is a lightweight state kernel and local-first control plane for loop engineering. From version 0.0.1 until 0.4.5, `loopx serve-status` in `loopx/status_server.py` uses `StatusRequestHandler._send_json()` and `do_OPTIONS()` to …
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High 7.6
RabbitMQ: CORS * reflects Origin with Allow-Credentials
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.17, 4.0.22, 4.1.13, and 4.2.6, match_origin/1 returned the bare reflected Origin and allowed credentials even when the wildcard "" was configured, so the response echoed the attacker's origi…
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High 8.7
Reflected arbitrary origins with credentials, allowing cross-origin reads of authenticated user data
The open-vsx.org deployment returned Access-Control-Allow-Origin reflecting the requesting origin together with Access-Control-Allow-Credentials: true on the authenticated /user/ endpoints. A page on any origin could therefore issue credentialed requests to t…
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High 7.4
Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config
A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-ori…
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High 8.1
Apache Storm Webapp: Authenticated API Responses Exposed to Arbitrary Web Origins
Description Three separate mechanisms allowed a web page on an unrelated origin to read responses that Storm's HTTP components served to an authenticated user. The Logviewer reflected the request's `Origin` header back in `Access-Control-Allow-Origin` while a…
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High 8.8
Azure Arc SQL Server Extension Elevation of Privilege Vulnerability
Permissive cross-domain policy with untrusted domains in Azure Arc allows an unauthorized attacker to elevate privileges over a network.
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High 8.6
Windows ML CLI: CORS misconfig enables localhost RCE
Windows ML CLI is a command line tool for building portable, performant, and high-quality AI models for Windows ML. Prior to 0.4.0, the src/winml/modelkit/serve/cli_api.py component exposes WinML CLI commands through a localhost HTTP API without authenticatio…
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High 8.1
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
HeyForm before 3.0.0-rc.8 reflects the request Origin header in CORS responses while allowing credentials, enabling cross-origin requests with authentication. Attackers can execute authenticated GraphQL queries from malicious pages visited by logged-in users …
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High 8.1
Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials
Rybbit before 2.7.0 contains a CORS misconfiguration vulnerability that allows attackers to bypass origin restrictions by reflecting any request origin in Access-Control-Allow-Origin responses while credentials are enabled. Attackers can issue credentialed cr…
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High 8.2
Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1…
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High 7.4
Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS e…
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High 7.5
Missing authentication and permissive CORS policy
ANDRITZ HIPASE-250 (formerly 250 SCALA), in the default configuration of affected versions, exposes its data and configuration endpoint without any authentication and permissive CORS on every response. An unauthenticated attacker with network access can read …
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High 7.5
Improper CORS handling in MOVEit Transfer
Permissive cross-domain security policy with untrusted domains vulnerability in Progress MOVEit Transfer. This issue affects MOVEit Transfer: before 2025.1.5, from 2026.0.0 before 2026.0.3.
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High 7.1
Grav < 1.0.0-rc.16 CORS Misconfiguration via API Plugin
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 shipped Access-Control-Allow-Origin: * as its default CORS configuration on all responses, including authenticated endpoints and preflight (OPTIONS) responses. Because the plugin accepts credent…
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High 7.2
Permissive Cross-domain Security Policy with Untrusted Domains in ASUS GameSDK allows a remote user to obtain a local u…
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High 8.8
Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft
Mockoon provides way to design and run mock APIs. Prior to 9.7.0, Mockoon's admin API in commons-server/src/libs/server/admin-api.ts is mounted on the same Express listener as user-defined mock routes, enabled by default in shipped runtimes, serves Access-Con…
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High 7.5
A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CO…
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High 7.4
Glances: XML-RPC Multi-Origin CORS Configuration Silently Falls Back to Wildcard (Incomplete Fix for CVE-2026-33533)
Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s) introduced a configurable CORS origin list in version 4.5.3 as a mitigation for CVE-2026-33533. However, the implementation silently falls…
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High 7.1
Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin (the default wildcard), the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Cred…
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High 8.1
PraisonAI - Cross-Origin Agent Execution via Hardcoded Wildcard CORS and Missing Authentication on AGUI Endpoint
PraisonAI before 1.5.128 contains a cross-origin agent execution vulnerability in the AGUI endpoint that allows remote attackers to trigger arbitrary agent execution. The POST /agui endpoint lacks authentication and hardcodes Access-Control-Allow-Origin: * he…
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High 8.2
Aqara Developer Portal cross-origin resource sharing
The Aqara Developer Portal (developer.aqara.com) and shared test environments (developer-test.aqara.com, aiot-test.aqara.com) exhibit cross-origin request sharing, which is an instance of "CWE-942: Permissive Cross-domain Policy with Untrusted Domains," and h…
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High 8.2
Aqara IAM/SSO Gateway cross-origin resource sharing
The Aqara IAM/SSO gateway (gw-builder.aqara.com) exhibits a cross-origin request sharing vulnerability, which is an instance of "CWE-942: Permissive Cross-domain Policy with Untrusted Domains," and has an estimated CVSS of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H…
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High 7.5
CORS misconfiguration in Nx Witness VMS allows session token exfiltration via cross-origin request
CORS misconfiguration in the REST API of Network Optix Nx Witness VMS before version 6.1.2, when running in the default Standard security mode, on Linux and Windows allows an unauthenticated remote attacker to steal the session token of an authenticated user …
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High 8.0
Cleanuparr: Reflective CORS combined with trusted-network auth allows cross-origin admin API reads
Cleanuparr is a tool for automating the cleanup of unwanted or blocked files in Sonarr, Radarr, and supported download clients like qBittorrent. Prior to 2.9.10, Cleanuparr's global CORS policy reflects every request Origin and combines it with AllowCredentia…
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High —
engram: HTTP server CORS wildcard + auth-off-by-default enables CSRF graph exfiltration and persistent indirect prompt injection
### Summary The local HTTP server started by `engram server` (binding `127.0.0.1:7337` by default) was exposed to any browser origin with no authentication unless `ENGRAM_API_TOKEN` was explicitly set. Combined with `Access-Control-Allow-Origin: *` on every r…
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High 8.1
AVideos has CORS Origin Reflection with Credentials on Sensitive API Endpoints that Enables Cross-Origin Account Takeover
WWBN AVideo is an open source video platform. In versions 29.0 and below, the `allowOrigin($allowAll=true)` function in `objects/functions.php` reflects any arbitrary `Origin` header back in `Access-Control-Allow-Origin` along with `Access-Control-Allow-Crede…
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High 7.7
Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (`/api/4/*`) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS…
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High 7.3
ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy
A vulnerability was found in ericc-ch copilot-api up to 0.7.0. The impacted element is the function cors of the file src/server.ts of the component Token Endpoint. Performing a manipulation results in permissive cross-domain policy with untrusted domains. It …
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High 8.1
PraisonAI: Cross-Origin Agent Execution via Hardcoded Wildcard CORS and Missing Authentication on AGUI Endpoint
## Summary The AGUI endpoint (`POST /agui`) has no authentication and hardcodes `Access-Control-Allow-Origin: *` on all responses. Combined with Starlette/FastAPI's Content-Type-agnostic JSON parsing, any website a victim visits can silently trigger arbitrary…
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High 7.1
Glances Vulnerable to Cross-Origin System Information Disclosure via XML-RPC Server CORS Wildcard
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, the Glances XML-RPC server (activated with glances -s or glances --server) sends Access-Control-Allow-Origin: * on every HTTP response. Because the XML-RPC handler does n…
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High 7.7CVE-2026-34200 Public exploit
Nhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port
Nhost is an open source Firebase alternative with GraphQL. Prior to version 1.41.0, The Nhost CLI MCP server, when explicitly configured to listen on a network port, applies no inbound authentication and does not enforce strict CORS. This allows a malicious w…
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High 8.1
mcp-memory-service's Wildcard CORS with Credentials Enables Cross-Origin Memory Theft
mcp-memory-service is an open-source memory backend for multi-agent systems. Prior to version 10.25.1, when the HTTP server is enabled (MCP_HTTP_ENABLED=true), the application configures FastAPI's CORSMiddleware with allow_origins=['*'], allow_credentials=Tru…
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High 8.1
AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS
WWBN AVideo is an open source video platform. In versions 25.0 and below, /objects/phpsessionid.json.php exposes the current PHP session ID to any unauthenticated request. The allowOrigin() function reflects any Origin header back in Access-Control-Allow-Orig…
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High 8.1
Glances's Default CORS Configuration Allows Cross-Origin Credential Theft
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, the Glances REST API web server ships with a default CORS configuration that sets `allow_origins=["*"]` combined with `allow_credentials=True`. When both of these options…
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High 7.1
AnythingLLM Permissable CORS policy
AnythingLLM is an application that turns pieces of content into context that any LLM can use as references during chatting. In 1.11.1 and earlier, On default installations where no password or API key has been configured, all HTTP endpoints and the agent WebS…
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High 7.4CVE-2026-27579 Public exploit
CollabPlatform : CORS Misconfiguration Allows Arbitrary Origin With Credentials Leading to Authenticated Account Data Exposure
CollabPlatform is a full-stack, real-time doc collaboration platform. In all versions of CollabPlatform, the Appwrite project used by the application is misconfigured to allow arbitrary origins in CORS responses while also permitting credentialed requests. An…
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High 7.4
Litestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed origins
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are n…