XSS in Foxit Pdf Editor Cloud
CVE-2025-66520
A stored cross-site scripting (XSS) vulnerability exists in the Portfolio feature of the Foxit PDF Editor cloud (pdfonline.foxit.com). User-supplied SVG files are not properly sanitized or validated before being inserted into the HTML structure. As a result, embedded HTML or JavaScript within a crafted SVG may execute whenever the Portfolio file list is rendered.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Foxit Pdf Editor Cloud
- Foxit Software Inc. Pdfonline.foxit.com — versions before 2025‑12‑01
Weakness classification (CWE)
References
- 14984358-7092-470d-8f34-ade47a7658a2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-66520?
- CVE-2025-66520 is a medium-severity vulnerability in Foxit Pdf Editor Cloud, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2025-12-19.
- How severe is CVE-2025-66520?
- Medium severity. CVSS v3 base score is 6.3 out of 10.