How severe is CVE-2025-65959?

CVE-2025-65959 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-2025-65959 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65959?

CVE-2025-65959 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65959?

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-2025-65959 have an EU (EUVD) identifier?

Yes. CVE-2025-65959 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201263.

When was CVE-2025-65959 published?

CVE-2025-65959 was published on 2025-12-04 and last updated on 2026-06-17.

CVE-2025-65959

CVE-2025-65959 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% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201263
Weakness: CWE-79
Affected product: Openwebui Open Webui
Published: 2025-12-04
Last modified: 2026-06-17

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.37, a Stored XSS vulnerability was discovered in Open-WebUI's Notes PDF download functionality. An attacker can import a Markdown file containing malicious SVG tags into Notes, allowing them to execute arbitrary JavaScript code and steal session tokens when a victim downloads the note as PDF. This vulnerability can be exploited by any authenticated user, and unauthenticated external attackers can steal session tokens from users (both admin and regular users) by sharing specially crafted markdown files. This vulnerability is fixed in 0.6.37.

Frequently asked questions

What is CVE-2025-65959?: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.37, a Stored XSS vulnerability was discovered in Open-WebUI's Notes PDF download functionality. An attacker can import a Markdown file containing malicious SVG tags into Notes, allowing them to execute arbitrary JavaScript code and steal session tokens when a victim downloads the note as PDF. This vulnerability can be exploited by any authenticated user, and unauthenticated external attackers can steal session tokens from users (both admin and regular users) by sharing specially crafted markdown files. This vulnerability is fixed in 0.6.37.
How severe is CVE-2025-65959?: CVE-2025-65959 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-2025-65959 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65959?: CVE-2025-65959 affects Openwebui Open Webui. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65959?: 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-2025-65959 have an EU (EUVD) identifier?: Yes. CVE-2025-65959 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201263.
When was CVE-2025-65959 published?: CVE-2025-65959 was published on 2025-12-04 and last updated on 2026-06-17.

References

Affected products (1)

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

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