How severe is CVE-2025-64495?

CVE-2025-64495 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-64495 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64495?

CVE-2025-64495 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64495?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-64495 have an EU (EUVD) identifier?

Yes. CVE-2025-64495 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38257.

When was CVE-2025-64495 published?

CVE-2025-64495 was published on 2025-11-08 and last updated on 2026-06-17.

CVE-2025-64495

CVE-2025-64495 is a high-severity vulnerability in Openwebui Open Webui with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38257
Weakness: CWE-79
Affected product: Openwebui Open Webui
Published: 2025-11-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-64495?: 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.
How severe is CVE-2025-64495?: CVE-2025-64495 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-64495 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64495?: CVE-2025-64495 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64495?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-64495 have an EU (EUVD) identifier?: Yes. CVE-2025-64495 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38257.
When was CVE-2025-64495 published?: CVE-2025-64495 was published on 2025-11-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

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