Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE
Published Nov 8, 2025
8.7
HIGHCVSS 3.1
EPSS 0.46%
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. In versions 0.6.34 and below, 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 a payload that could be triggered by other users if they run the corresponding / command to insert the prompt. This issue is fixed in version 0.6.35.
Affected products
-
- Version < 0.6.35StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Open-Webui | Open-Webui | n/a |
|
- < 0.6.35
No data.
No Red Hat product state for this CVE.
open-webui
npm
Introduced 0 Fixed 0.6.35open-webui
PyPI
Introduced 0 Fixed 0.6.35
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | open-webui | 0 | 0.6.35 |
| PyPI | open-webui | 0 | 0.6.35 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1 other source (GHSA) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Nov 10, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.46% (0.00460) | 37.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00450) | 35.58th | v5 (v2026.06.15) |
| Nov 8, 2025 | 0.03% (0.00025) | 5.59th | v4 (v2025.03.14) |
References (5)
- https://github.com/advisories/GHSA-w7xj-8fx7-wfch Advisory
- https://github.com/open-webui/open-webui/blob/7a83e7dfa367d19f762ec17cac5e4a94ea2bd97d/src/lib/components/common/RichTextInput.svelte#L348 x_refsource_MISCProduct
- https://github.com/open-webui/open-webui/commit/eb9c4c0e358c274aea35f21c2856c0a20051e5f1 x_refsource_MISCPatch
- https://github.com/open-webui/open-webui/security/advisories/GHSA-w7xj-8fx7-wfch x_refsource_CONFIRMExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-64495
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-w7xj-8fx7-wfch | Advisory | |
| https://github.com/open-webui/open-webui/blob/7a83e7dfa367d19f762ec17cac5e4a94ea2bd97d/src/lib/components/common/RichTextInput.svelte#L348 | x_refsource_MISCProduct | |
| https://github.com/open-webui/open-webui/commit/eb9c4c0e358c274aea35f21c2856c0a20051e5f1 | x_refsource_MISCPatch | |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-w7xj-8fx7-wfch | x_refsource_CONFIRMExploitThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2025-64495 |
Change history (0)
No recorded changes yet.