#js

json-schema-editor-visual is a package that provides jsonschema editor. A Prototype Pollution vulnerability in the setData and deleteData function of json-schema-editor-visual versions thru 1.1.1 allows attackers to inject or delete properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.

A Prototype Pollution vulnerability in the toCsv function of csvjson versions thru 5.1.0 allows attackers to inject properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.

### Summary The EmbedVideo extension allows adding arbitrary attributes to an HTML element, allowing for stored XSS through wikitext. ### Details The attributes of an iframe are populated with the value of an unreserved data attribute (`data-iframeconfig`) that can be set via wikitext: https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/ext.embedVideo.videolink.js#L5-L20 Similar code is also present here: https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/modules/iframe.js#L139-L155 It is possible to execute JS through attributes like `onload` or `onmouseenter`. ### PoC 1. Create a page with the following contents: ```html <div class="embedvideo-evl" data-iframeconfig='{"onload": "alert(1)"}'>Click me!</div> <evlplayer></evlplayer> ``` 2. Click on the "Click me!" text 3. Click on the "Load video" button below <img width="855" height="404" a...

The Mastra Docs MCP Server package `@mastra/mcp-docs-server` is a server designed to provide documentation context to AI agentic workflows, such as those used in AI-powered IDEs. **Resources:** * Package URL: [https://www.npmjs.com/package/@mastra/mcp-docs-server](https://www.npmjs.com/package/@mastra/mcp-docs-server) ----- ## Overview The `@mastra/mcp-docs-server` package in versions **0.13.18 and below** is vulnerable to a Directory Traversal attack that results in the disclosure of directory listings. The code contains a security check to prevent path traversal for reading file contents, but this check is effectively bypassed by subsequent logic that attempts to find directory suggestions. An attacker can leverage this flaw to list the contents of arbitrary directories on the user's filesystem, including the user's home directory, exposing sensitive information about the file system's structure. ----- ## Vulnerability The tool's code attempts to prevent path traversal with...

# Command Injection in adb-mcp MCP Server The MCP Server at https://github.com/srmorete/adb-mcp is written in a way that is vulnerable to command injection vulnerability attacks as part of some of its MCP Server tool definition and implementation. The MCP Server is also published publicly to npm at www.npmjs.com/package/adb-mcp and allows users to install it. ## Vulnerable tool The MCP Server defines the function `executeAdbCommand()` which executes commands via string as a parameter and wraps the promise-based `exec` function. The MCP Server then exposes the tool `inspect_ui` which relies on Node.js child process API `exec` (through the function wrapper) to execute the Android debugging command (`adb`). Relying on `exec` is an unsafe and vulnerable API if concatenated with untrusted user input. Data flows from the tool definition [here](https://github.com/srmorete/adb-mcp/blob/master/src/index.ts#L334-L343) which takes in `args.device` and calls `execPromise()` in [this definiti...

### Impact v3.1.0, v2.1.3, v1.16.5 and below ### Patches Has been patched in 3.1.1, 2.1.4, and 1.16.6 ### Workarounds You can use the ignore option to ignore non files/directories. ```js ignore (_, header) { // pass files & directories, ignore e.g. symlinks return header.type !== 'file' && header.type !== 'directory' } ``` ### Credit Reported by: Mapta / BugBunny_ai

The csvtojson package, a tool for converting CSV data to JSON with customizable parsing capabilities, contains a prototype pollution vulnerability in versions prior to 2.0.10. This issue arises due to insufficient sanitization of nested header names during the parsing process in the parser_jsonarray component. When processing CSV input containing specially crafted header fields that reference prototype chains (e.g., using __proto__ syntax), the application may unintentionally modify properties of the base Object prototype. This vulnerability can lead to denial of service conditions or unexpected behavior in applications relying on unmodified prototype chains, particularly when untrusted CSV data is processed. The flaw does not require user interaction beyond providing a maliciously constructed CSV file.

The Runtime components of messageformat package for Node.js prior to version 3.0.1 contain a prototype pollution vulnerability. Due to insufficient validation of nested message keys during the processing of message data, an attacker can manipulate the prototype chain of JavaScript objects by providing specially crafted input. This can result in the injection of arbitrary properties into the Object.prototype, potentially leading to denial of service conditions or unexpected application behavior. The vulnerability allows attackers to alter the prototype of base objects, impacting all subsequent object instances throughout the application's lifecycle. This issue remains unaddressed in the latest available version.

This week on the Lock and Code podcast, we speak with Peter Dolanjski about the internet's thirst for your data, and how to stay private.

### Summary The lack of sanitization of URLs protocols in the `createLink.openLink` function enables the execution of arbitrary JavaScript code within the context of the parent page. ### Details https://github.com/FrontFin/mesh-web-sdk/blob/cf013b85ab95d64c63cbe46d6cb14695474924e7/packages/link/src/Link.ts#L441 The `createLink.openLink` function takes base64 encoded links, decodes them, and then sets the resulting string as the `src` attribute of an `iframe`. It’s important to note that the protocol part is not validated, so a payload, which is a valid URL, such as `javascript:alert(document.domain)//`, can be provided to the function. ### PoC 1. Extract [poc-mesh-web-sdk.zip](https://github.com/user-attachments/files/22223079/poc-mesh-web-sdk.zip) 2. Run `yarn install` and then `yarn start` 3. Paste this payload inside the input box: `amF2YXNjcmlwdDphbGVydCh3aW5kb3cucGFyZW50LmRvY3VtZW50LmJvZHkuZ2V0RWxlbWVudHNCeVRhZ05hbWUoImgyIikuaXRlbSgwKVsiaW5uZXJIVE1MIl0pLy8=` 4. Click on the _Ope...