How severe is CVE-2025-66519?

CVE-2025-66519 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-66519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66519?

CVE-2025-66519 affects Foxit Pdf Editor Cloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66519 have an EU (EUVD) identifier?

Yes. CVE-2025-66519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204457.

When was CVE-2025-66519 published?

CVE-2025-66519 was published on 2025-12-19 and last updated on 2026-06-17.

CVE-2025-66519

CVE-2025-66519 is a medium-severity vulnerability in Foxit Pdf Editor Cloud with a CVSS 3.x base score of 6.3. 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: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204457
Weakness: CWE-79
Affected product: Foxit Pdf Editor Cloud
Published: 2025-12-19
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Layer Import functionality. A crafted payload can be injected into the “Create new Layer” field during layer import and is later rendered into the DOM without proper sanitization. As a result, the injected script executes when the Layers panel is accessed.

Frequently asked questions

What is CVE-2025-66519?: A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Layer Import functionality. A crafted payload can be injected into the “Create new Layer” field during layer import and is later rendered into the DOM without proper sanitization. As a result, the injected script executes when the Layers panel is accessed.
How severe is CVE-2025-66519?: CVE-2025-66519 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-66519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66519?: CVE-2025-66519 affects Foxit Pdf Editor Cloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66519 have an EU (EUVD) identifier?: Yes. CVE-2025-66519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204457.
When was CVE-2025-66519 published?: CVE-2025-66519 was published on 2025-12-19 and last updated on 2026-06-17.

References

https://www.foxit.com/support/security-bulletins.html

Affected products (1)

cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:*

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