Vulnerability · Published Feb 3, 2026 · Assigned by Foxit
CVE-2026-1591Stored XSS via Attachments Feature in https://pdfonline.foxit.com/
Medium 6.3
In plain English
A medium-severity cross-site scripting in pdfonline.foxit.com from Foxit Software Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.2%top 85.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Foxit Software Inc. | pdfonline.foxit.com | before 2026‑02‑03 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N