#js

### Summary: A bypass was discovered in the `Koa.js` framework affecting its back redirect functionality. In certain circumstances, an attacker can manipulate the Referer header to force a user’s browser to navigate to an external, potentially malicious website. This occurs because the implementation incorrectly treats some specially crafted URLs as safe relative paths. Exploiting this vulnerability could allow attackers to perform phishing, social engineering, or other redirect-based attacks on users of affected applications. This vulnerability affects the code referenced in GitHub Advisory GHSA-jgmv-j7ww-jx2x (which is tracked as CVE‑2025‑54420). ### Details: The patched code attempts to treat values that `startWith('/')` as safe relative paths and only perform origin checks for absolute URLs. However, protocol‑relative URLs (those beginning with //host) also start with '/' and therefore match the startsWith('/') branch. A protocol‑relative referrer such as `//evil.com` with trai...

### Summary In some Notification types (e.g., Webhook, Telegram), the `send()` function allows user-controlled renderTemplate input. This leads to a Server-side Template Injection (SSTI) vulnerability that can be exploited to read arbitrary files from the server. ### Details The root cause is how Uptime Kuma renders user-controlled templates via `renderTemplate()`. The function instantiates a Liquid template engine and parses the `template` argument without sanitization: ```js async renderTemplate(template, msg, monitorJSON, heartbeatJSON) { const engine = new Liquid(); const parsedTpl = engine.parse(template); // ... } ``` In some Notification flows, the `send()` implementation passes user-editable fields directly into `renderTemplate()`: ```js // webhook.js if (notification.webhookContentType === "form-data") { const formData = new FormData(); formData.append("data", JSON.stringify(data)); config.headers = formData.getHeaders(); data = formData; } ...

### Summary Files denied by [`server.fs.deny`](https://vitejs.dev/config/server-options.html#server-fs-deny) were sent if the URL ended with `\` when the dev server is running on Windows. ### Impact Only apps that match the following conditions are affected: - explicitly exposes the Vite dev server to the network (using --host or [`server.host` config option](https://vitejs.dev/config/server-options.html#server-host)) - running the dev server on Windows ### Details `server.fs.deny` can contain patterns matching against files (by default it includes `.env`, `.env.*`, `*.{crt,pem}` as such patterns). These patterns were able to bypass by using a back slash(`\`). The root cause is that `fs.readFile('/foo.png/')` loads `/foo.png`. ### PoC ```shell npm create vite@latest cd vite-project/ cat "secret" > .env npm install npm run dev curl --request-target /.env\ http://localhost:5173 ``` <img width="1593" height="616" alt="image" src="https://github.com/user-attachments/assets/36212f4e-1d3...

### Summary The GoCardless components in Actualbudget in are logging responses to STDOUT in a parsed format using `console.log`and `console.debug` (Which in this version of node is an alias for `console.log`). This is exposing sensitive information in log files including, but not limited to: - Gocardless bearer tokens. - Account IBAN and Bank Account numbers. - PII of the account holder. - Transaction details (Payee bank information, Recipient account numbers, Transaction IDs)... ### Details Whenever GoCardless responds to a request, the payload is printed to the debug log: https://github.com/actualbudget/actual/blob/36c40d90d2fe09eb1f25a6e2f77f6dd40638b267/packages/sync-server/src/app-gocardless/banks/integration-bank.js#L25-L27 This in turn logs the following information to Docker (all values removed here. These fields are possibly dependent on what is returned by each institution so may differ): ```json { "account": { "resourceId": "", "iban": "", "bban": "", ...

### Impact Prototype pollution potential with the utility function `rollbar/src/utility`.`set()`. No impact when using the published public interface. If application code directly imports `set` from `rollbar/src/utility` and then calls `set` with untrusted input in the second argument, it is vulnerable to prototype pollution. POC: ```js const obj = {}; require("rollbar/src/utility").set(obj, "__proto__.polluted", "vulnerable"); console.log({}.polluted !== undefined ? '[POLLUTION_TRIGGERED]':''); ``` ### Patches Fixed in version 2.26.5 and 3.0.0-beta5. ### Workarounds If application code directly imports `set` from `rollbar/src/utility`, ensure that the second argument does not receive untrusted input. ### References https://github.com/rollbar/rollbar.js/issues/1333#issuecomment-3353720946

### Summary The JS implementation for copying button labels to the sticky header in the Citizen skin unescapes HTML characters, allowing for stored XSS through system messages. ### Details In the `copyButtonAttributes` function in `stickyHeader.js`, when copying the button labels, the `innerHTML` of the new element is set to the `textContent` of the old element: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/f4cbcecf5aca0ae69966b23d4983f9cb5033f319/resources/skins.citizen.scripts/stickyHeader.js#L29-L41 This unescapes any escaped HTML characters and causes the contents of the system messages to be interpreted as HTML. ### PoC 1. Edit any of the affected messages (`citizen-share`, `citizen-view-history`, `citizen-view-edit`, `nstab-talk`) to the following payload: `<img src="" onerror="alert('Sticky Header Button XSS')">`. 2. Visit any mainpage article in the wiki using the Citizen skin. <img width="495" height="228" alt="image" src="https://github.com/user-attachme...

### Description In the FlightServer class of the pyquokka framework, the do_action() method directly uses pickle.loads() to deserialize action bodies received from Flight clients without any sanitization or validation, which results in a remote code execution vulnerability. The vulnerable code is located in pyquokka/flight.py at line 283, where arbitrary data from Flight clients is directly passed to pickle.loads(). Even more concerning, when FlightServer is configured to listen on 0.0.0.0 (as shown in the provided server example at line 339), this allows attackers across the entire network to perform arbitrary remote code execution by sending malicious pickled payloads through the set_configs action. In addition, the functions cache_garbage_collect, do_put, and do_get also contain vulnerability points where pickle.loads is used to deserialize untrusted remote data. Please review and fix these issues accordingly. This report uses the set_configs action as an example. ### Proof of ...

### Vulnerability Description --- Vulnerability Overview - When the client sends an arbitrary URL array and impl: ["naive"] to the tRPC endpoint tools.search.crawlPages, the server issues outbound HTTP requests directly to those URLs. There is no defensive logic that restricts or validates requests to internal networks (127.0.0.1, localhost, private ranges) or metadata endpoints (169.254.169.254). - Flow: client input (urls, impls) → service invocation in the tRPC router → the service passes the URLs to Crawler.crawl → the Crawler prioritizes the user-specified impls (naive) → the naive implementation performs a server-side fetch(url) as-is (SSRF) → the server collects responses from internal resources. - In the dev environment, authentication can be bypassed using the lobe-auth-dev-backend-api: 1 header (production requires a valid token). In the PoC, this was used to successfully retrieve the internal API at localhost:8889 from the server side. Vulnerable Code https://github...

### Summary JSON objects after decoding might use more memory than their serialized version. It is possible to tune a JSON to maximize the factor between serialized memory usage and deserialized memory usage (similar to a zip bomb). While reproducing the issue, we could reach a factor of about 35. This can be used to circumvent the [`max_request_size` (https://openbao.org/docs/configuration/listener/tcp/) configuration parameter, which is meant to protect against Denial of Service attacks, and also makes Denial of Service attacks easier in general, as the attacker needs much less resources. ### Details The request body is parsed into a `map[string]interface{}` https://github.com/openbao/openbao/blob/788536bd3e10818a7b4fb00aac6affc23388e5a9/http/logical.go#L50 very early in the request handling chain (before authentication), which means an attacker can send a specifically crafted JSON object and cause an OOM crash. Additionally, for simpler requests with large numbers of strings, the...

The North Korean threat actor linked to the Contagious Interview campaign has been observed merging some of the functionality of two of its malware programs, indicating that the hacking group is actively refining its toolset. That's according to new findings from Cisco Talos, which said recent campaigns undertaken by the hacking group have seen the functions of BeaverTail and OtterCookie coming