#xss

### Summary In the default configuration of mermaid 11.9.0, user supplied input for sequence diagram labels is passed to `innerHTML` during calculation of element size, causing XSS. ### Details Sequence diagram node labels with KaTeX delimiters are passed through `calculateMathMLDimensions`. This method passes the full label to `innerHTML` which allows allows malicious users to inject arbitrary HTML and cause XSS when mermaid-js is used in it's default configuration (with KaTeX support enabled). The vulnerability lies here: ```ts export const calculateMathMLDimensions = async (text: string, config: MermaidConfig) => { text = await renderKatex(text, config); const divElem = document.createElement('div'); divElem.innerHTML = text; // XSS sink, text has not been sanitized. divElem.id = 'katex-temp'; divElem.style.visibility = 'hidden'; divElem.style.position = 'absolute'; divElem.style.top = '0'; const body = document.querySelector('body'); body?.insertAdjacentElemen...

### Summary In the default configuration of mermaid 11.9.0, user supplied input for architecture diagram icons is passed to the d3 `html()` method, creating a sink for cross site scripting. ### Details Architecture diagram service `iconText` values are passed to the d3 `html()` method, allowing malicious users to inject arbitrary HTML and cause XSS when mermaid-js is used in it's default configuration. The vulnerability lies here: ```ts export const drawServices = async function ( db: ArchitectureDB, elem: D3Element, services: ArchitectureService[] ): Promise<number> { for (const service of services) { /** ... **/ } else if (service.iconText) { bkgElem.html( `<g>${await getIconSVG('blank', { height: iconSize, width: iconSize, fallbackPrefix: architectureIcons.prefix })}</g>` ); const textElemContainer = bkgElem.append('g'); const fo = textElemContainer .append('foreignObject') .attr('width', iconSize) .attr('he...

A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q2.0 through 2025.Q2.8, 2025.Q1.0 through 2025.Q1.15, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.1 through 2024.Q2.13 and 2024.Q1.1 through 2024.Q1.19 allows a remote authenticated user to inject JavaScript code via _com_liferay_expando_web_portlet_ExpandoPortlet_displayType parameter. Liferay Portal is fixed on the master branch from commit acc4771.

### Summary In affected versions of `astro`, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. ### Details On-demand rendered sites built with Astro include an `/_image` endpoint which returns optimized versions of images. The `/_image` endpoint is restricted to processing local images bundled with the site and also supports remote images from domains the site developer has manually authorized (using the [`image.domains`](https://docs.astro.build/en/reference/configuration-reference/#imagedomains) or [`image.remotePatterns`](https://docs.astro.build/en/reference/configuration-reference/#imageremotepatterns) options). However, a bug in impacted versions of `astro` allows an attacker to bypass the third-party domain restrictions by using a protocol-relative URL as the image source, e.g. `/_image?href=//example.com/image.png`. ### Proof of Concept 1. Create a new minimal Astro project (`as...

### Impact A stored **Cross-Site Scripting (XSS)** vulnerability was identified in [n8n](https://github.com/n8n-io/n8n), specifically in the **Form Trigger** node's **HTML form element**. An authenticated attacker can inject malicious HTML via an `<iframe>` with a `srcdoc` payload that includes arbitrary JavaScript execution. The attacker can also inject malicious Javascript by using `<video>` coupled `<source>` using an `onerror` event. While using `iframe` or a combination of `video` and `source` tag, this vulnerability allows for Account Takeover (ATO) by exfiltrating `n8n-browserId` and session cookies from authenticated users who visit a maliciously crafted form. Using these tokens and cookies, an attacker can impersonate the victim and change account details such as email addresses, enabling full control over the account—especially if 2FA is not enabled. ### Patches The issue was addressed in [PR #16329](https://github.com/n8n-io/n8n/pull/16329). Users should upgrade to versio...

A Stored cross-site scripting vulnerability in the Liferay Portal 7.4.3.120 through 7.4.3.132, and Liferay DXP 2025.Q2.0 through 2025.Q2.8, 2025.Q1.0 through 2025.Q1.15, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.1 through 2024.Q2.13 and 2024.Q1.9 through 2024.Q1.19 allows an remote authenticated attacker to inject JavaScript through the message boards feature available via the web interface. Liferay Portal is fixed on the master branch from commit c1b7c6b.

### Summary A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.6.0) in the Alert Template creation feature. This allows a user with the **admin role** to inject malicious JavaScript, which will be executed when the template is rendered, potentially compromising other admin accounts. --- ### Details In the LibreNMS web UI, when a user with the **admin role** visits `/templates` and clicks **"Create new alert template"**, the **"Template name"** field fails to properly sanitize input. By inserting a payload like: ``` &lt;script>alert(document.cookie)&lt;/script> ``` and filling the other fields with arbitrary content (e.g., `test`), once the template is saved, the script is executed. This confirms that user input is stored and later rendered without proper output encoding. This vulnerability can be exploited for session hijacking, data theft, or other malicious actions targeting other admin users. --- ### PoC 1. Log in to LibreNMS using an account with t...

A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.8, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.16 and 7.4 GA through update 92 allows an remote authenticated user to inject JavaScript in message board threads and categories.

A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.7 allows a remote authenticated attacker to inject JavaScript code via the content page's name field. This malicious payload is then reflected and executed within the user's browser when viewing the "document View Usages" page. Liferay Portal is fixed on the master branch from commit 2135a88.

A vulnerability has been found in ExpressGateway express-gateway up to 1.16.10. Affected is an unknown function in the library lib/rest/routes/apps.js of the component REST Endpoint. The manipulation leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.