{"id":"CVE-2025-66470","aliases":["GHSA-2m4f-cg75-76w2","PYSEC-2026-1696"],"url":"https://o3.security/vulnerability/CVE-2025-66470","summary":"NiceGUI Stored/Reflected XSS in ui.interactive_image via unsanitized SVG content","details":"### Summary\nA Cross-Site Scripting (XSS) vulnerability exists in the `ui.interactive_image` 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.\n\n### Details\nThe vulnerability is located in `nicegui/elements/interactive_image.js`.\nThe component uses the following code to render content:\n```javascript\n\n```\nVue's v-html directive renders raw HTML strings into the DOM. If an application allows user-controlled input to be passed to the content property of an interactive image, an attacker can embed a tag containing malicious scripts, bypassing typical image restrictions.\n\n### PoC\n```python\nfrom nicegui import ui\n\n@ui.page('/')\ndef main():\n ui.label('NiceGUI SVG XSS PoC')\n \n # Standard image loading\n img = ui.interactive_image('[https://picsum.photos/640/360](https://picsum.photos/640/360)')\n \n # Payload: Embeds raw HTML execution inside SVG\n # This executes immediately when the image component is rendered\n img.content = (\n ''\n ''\n '

'\n ''\n ''\n )\n\nui.run()\n```\n\n### Impact\n- Type: Reflected / Stored XSS (depending on data source)\n\n- Severity: Moderate\n\n- Impact: Attackers can inject malicious scripts that execute whenever the image component is rendered or updated. This is particularly dangerous for dashboards or multi-user applications displaying user-generated content or annotations.","published":"2025-12-09T00:11:14.690Z","modified":"2026-08-12T03:51:18.846569965Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00258,"percentile":0.17662,"asOf":"2026-08-19"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"nicegui","fixedVersion":"3.4.0"}],"fix":{"url":"https://github.com/zauberzeug/nicegui/commit/58ad0b36e19922de16bbc79ea3ddd29851b1a3e3","label":"zauberzeug/nicegui@58ad0b3"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66470.json"},{"type":"ADVISORY","url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-2m4f-cg75-76w2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66470"},{"type":"FIX","url":"https://github.com/zauberzeug/nicegui/commit/58ad0b36e19922de16bbc79ea3ddd29851b1a3e3"},{"type":"PACKAGE","url":"https://github.com/zauberzeug/nicegui"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:18.846569965Z"}}