What is CVE-2026-1591?

CVE-2026-1591 is a medium-severity vulnerability in Foxit Pdf Editor Cloud, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2026-02-03.

How severe is CVE-2026-1591?

Medium severity. CVSS v3 base score is 6.3 out of 10.

XSS in Foxit Pdf Editor Cloud

CVE-2026-1591

Foxit PDF Editor Cloud (pdfonline) contains a stored cross-site scripting vulnerability in the file upload feature. A malicious username is embedded into the upload file list without proper escaping, allowing arbitrary JavaScript execution when the list is displayed. This issue affects pdfonline.foxit.com: before 2026‑02‑03.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.5th percentile) — read the EPSS interpretation.

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.

Affected products

Foxit Pdf_editor_cloud
Foxit Software Inc. Pdfonline.foxit.com — versions before 2026‑02‑03

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

14984358-7092-470d-8f34-ade47a7658a2 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-1591?: CVE-2026-1591 is a medium-severity vulnerability in Foxit Pdf Editor Cloud, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2026-02-03.
How severe is CVE-2026-1591?: Medium severity. CVSS v3 base score is 6.3 out of 10.