Open WebUI allows limited stored XSS vila uploaded html file

Summary Low privileged users can upload HTML files which contain JavaScript code via the /api/v1/files/ backend endpoint. This endpoint returns a file id, which can be used to open the file in the browser and trigger the JavaScript code in the user's browser. Under the default settings, files...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS in the file upload process. An attacker can execute arbitrary JavaScript code in the context of another user's browser by uploading a crafted HTML file and convincing an admin or the...

CVE-2025-12799 Jastow: jastow cross-site scripting attack due to unsanitized uri

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting XSS attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling...

EUVD-2025-210439

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting XSS attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling...

CVE-2025-12799

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting XSS attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling...

CVE-2025-12799 Jastow: jastow cross-site scripting attack due to unsanitized uri

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting XSS attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling...

CVE-2025-12799

CVE-2025-12799 affects Jastow and is described as a Cross-Site Scripting (XSS) vulnerability that arises when a configuration allows unescaped characters in URLs with embedded Undertow and Jastow, indicating improper input handling. The CVSS 3.1 base vector shows a Network attack vector, high aut...

CVE-2025-12799

A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting XSS attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling. Mitigation It is possible to contruct...

PYSEC-2026-1402 GI-DocGen vulnerable to Reflected XSS via unescaped query strings

A flaw was found in GI-DocGen. This vulnerability allows arbitrary JavaScript execution in the context of the page — enabling DOM access, session cookie theft and other client-side attacks — via a crafted URL that supplies a malicious value to the q GET parameter reflected DOM XSS...

PYSEC-2026-1668 MobSF has Stored XSS via Manifest Analysis - Dialer Code Host Field

Summary A Stored Cross-site Scripting XSS vulnerability in MobSF's Android manifest analysis allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session by uploading a malicious APK. The android:host attribute from elements is rendered in HTML reports without...

PYSEC-2026-1502 Label Studio is vulnerable to full account takeover by chaining Stored XSS + IDOR in User Profile via custom_hotkeys field

Prologue These vulnerabilities have been found and chained by DCODX-AI. Validation of the exploit chain has been confirmed manually. Summary A persistent stored cross-site scripting XSS vulnerability exists in the customhotkeys functionality of the application. An authenticated attacker or one wh...

PYSEC-2026-1701 NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links

Summary An unsafe implementation in the click event listener used by ui.subpages, combined with attacker-controlled link rendering on the page, causes an XSS when the user actively clicks on the link. Details 1. On click, eventually subpagesnavigate event is emitted...

PYSEC-2026-1698 NiceGUI is vulnerable to XSS via Unescaped URL in ui.navigate.history.push() / replace()

Summary XSS risk exists in NiceGUI when developers pass attacker-controlled strings into ui.navigate.history.push or ui.navigate.history.replace. These helpers are documented as History API wrappers for updating the browser URL without page reload. However, if the URL argument is embedded into...

PYSEC-2026-1702 NiceGUI apps which use `ui.sub_pages` vulnerable to zero-click XSS

Summary An unsafe implementation in the pushstate event listener used by ui.subpages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. Details The problem is traced as follows: 1. On pushstate, handleStateEvent is...

PYSEC-2026-1696 NiceGUI Stored/Reflected XSS in ui.interactive_image via unsanitized SVG content

Summary A Cross-Site Scripting XSS vulnerability exists in the ui.interactiveimage component of NiceGUI v3.3.1 and earlier. The component renders SVG content using Vue's v-html directive without any sanitization. This allows attackers to inject malicious HTML or JavaScript via the SVG tag. Detail...

PYSEC-2026-1937 Spotipy has a XSS vulnerability in its OAuth callback server

Summary XSS vulnerability in OAuth callback server allows JavaScript injection through unsanitized error parameter. Attackers can execute arbitrary JavaScript in the user's browser during OAuth authentication. Details Vulnerable Code: spotipy/oauth2.py lines 1238-1274 RequestHandler.doGET The...

PYSEC-2026-1741 Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE

Summary The functionality that inserts custom prompts into the chat window is vulnerable to DOM XSS when 'Insert Prompt as Rich Text' is enabled, since the prompt body is assigned to the DOM sink .innerHtml without sanitisation. Any user with permissions to create prompts can abuse this to plant ...

PYSEC-2026-1714 OctoPrint vulnerable to XSS in Action Commands Notification and Prompt

Impact OctoPrint versions up to and including 1.11.3 are affected by a vulnerability that allows injection of arbitrary HTML and JavaScript into Action Command notification and prompt popups generated by the printer. An attacker who successfully convinces a victim to print a specially crafted fil...

PYSEC-2026-1364 FastMCP vulnerable to reflected XSS in client's callback page

Summary While setting up an oauth client, it was noticed that the callback page hosted by the client during the flow embeds user-controlled content without escaping or sanitizing it. This leads to a reflected Cross-Site-Scripting vulnerability. Details The affected code is located in...

PYSEC-2026-1247 CKAN vulnerable to stored XSS in resource description

Impact The helpers.markdownextract function did not perform sufficient sanitization of input data before wrapping in an HTML literal element. This helper is used to render user-provided data on dataset, resource, organization or group pages plus any page provided by an extension that used that...