Medium severity · published Feb 3, 2026
CVE-2026-1591
Stored XSS via Attachments Feature in https://pdfonline.foxit.com/
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PD
pdfonline.foxit.com · Foxit Software Inc.
before 2026‑02‑03 · source: vendor
PE
Pdf Editor Cloud · Foxit
before 2026-02-03 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1591
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1591
Vendor Advisory
https://www.foxit.com/support/security-bulletins.html
More from pdfonline.foxit.com
5.4
CVE-2026-1592
Stored XSS via Create New Layer Field found in Foxit PDF Editor Cloud
5.4
CVE-2025-66522
Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Digital IDs Common Name Field
5.4
CVE-2025-66521
Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Trusted Certificates Feature
5.4
CVE-2025-66520
Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Portfolio SVG Handling
5.4
CVE-2025-66519
Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Layer Import Functionality