CVE-2026-21873: Improper Neutralization of Input During Web Page Generation

NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, 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. This issue has been...

CVE-2026-21871: Improper Neutralization of Input During Web Page Generation

NiceGUI is a Python-based UI framework. From versions 2.13.0 to 3.4.1, there is a XSS risk 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...

CVE-2026-21874: Missing Release of Resource after Effective Lifetime

NiceGUI is a Python-based UI framework. From versions v2.10.0 to 3.4.1, an unauthenticated attacker can exhaust Redis connections by repeatedly opening and closing browser tabs on any NiceGUI application using Redis-backed storage. Connections are never released, leading to service degradation wh...

Directory Traversal

NiceGUI is vulnerable to Directory Traversal. The vulnerability is due to improper validation in the App.addmediafiles function, which allows an attacker to access and read arbitrary files from the server filesystem...

Cross Site Scripting (XSS)

NiceGUI is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to the ui.interactiveimage component rendering SVG content using Vue’s v-html directive without sanitization, which allows an attacker to inject malicious HTML or JavaScript via the SVG tag when the image component is...

Exploit for CVE-2025-66470

NiceGUI XSS Scanner - CVE-2025-66470 !Pythonhttps://img.sh...

CVE-2025-66645

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

CVE-2025-66470

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are subject to a XSS vulnerability through the ui.interactiveimage component of NiceGUI. The component renders SVG content using Vue's v-html directive without any sanitization. This allows attackers to inject malicious HTML or...

CVE-2025-66645

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

CVE-2025-66645 NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

ai-plays-jackbox (>=0.0.1, <=0.3.2), aignostics (>=0.2.200, <=0.2.226) +51 more potentially affected by CVE-2025-66645 via nicegui (>=0.5.9, <=3.3.1)

nicegui PYPI version =0.5.9, =0.0.1, =0.2.200, =0.0.0, =0.1.3, =0.1.0, =1.1.3, =0.6.7, =1.0.0, =1.2.0, =0.10.0, =0.11.1 and more Source cves: CVE-2025-66645 Source advisory: MEND:CVE-2025-66645...

CVE-2025-66645 NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

EUVD-2025-201931

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

CVE-2025-66645

CVE-2025-66645 - NiceGUI Directory Traversal : Plenty of connected sources confirm a vulnerability in NiceGUI (

CVE-2025-66645 NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading

NiceGUI is a Python-based UI framework. Versions 3.3.1 and below are vulnerable to directory traversal through the App.addmediafiles function, which allows a remote attacker to read arbitrary files on the server filesystem. This issue is fixed in version 3.4.0...

synth-mapping-helper (1.5.8) potentially affected by CVE-2025-66645 via nicegui (2.7.0)

nicegui PYPI version 2.7.0 is affected by a known vulnerability. The following packages have a transitive dependency on nicegui and may be impacted: - synth-mapping-helper 1.5.8 Source cves: CVE-2025-66645 Source advisory: OSV:GHSA-HXP3-63HC-5366...

openorchestrator (>=1.1.0, <=1.3.1) potentially affected by CVE-2025-66645 via nicegui (1.4.12)

nicegui PYPI version 1.4.12 is affected by a known vulnerability. The following packages have a transitive dependency on nicegui and may be impacted: - openorchestrator =1.1.0, =1.3.1 Source cves: CVE-2025-66645 Source advisory: OSV:GHSA-HXP3-63HC-5366...

rosys (>=0.5.3, <=0.5.10) potentially affected by CVE-2025-66645 via nicegui (0.7.6)

nicegui PYPI version 0.7.6 is affected by a known vulnerability. The following packages have a transitive dependency on nicegui and may be impacted: - rosys =0.5.3, =0.5.10 Source cves: CVE-2025-66645 Source advisory: OSV:GHSA-HXP3-63HC-5366...

otanalytics (>=0.6.15, <=0.7.5), synth-mapping-helper (1.5.19) potentially affected by CVE-2025-66645 via nicegui (2.24.1)

nicegui PYPI version 2.24.1 is affected by a known vulnerability. The following packages have a transitive dependency on nicegui and may be impacted: - otanalytics =0.6.15, =0.7.5 - synth-mapping-helper 1.5.19 Source cves: CVE-2025-66645 Source advisory: OSV:GHSA-HXP3-63HC-5366...

openadapt (0.7.1) potentially affected by CVE-2025-66645 via nicegui (1.2.16)

nicegui PYPI version 1.2.16 is affected by a known vulnerability. The following packages have a transitive dependency on nicegui and may be impacted: - openadapt 0.7.1 Source cves: CVE-2025-66645 Source advisory: OSV:GHSA-HXP3-63HC-5366...