TI-2026-01278 Aliases CVE-2026-1591 GHSA-g4wf-v389-9w53

Stored XSS via Attachments Feature in https://pdfonline.foxit.com/

LOW 28CWE-79Published 2026-02-03 · Updated 2026-02-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00233 14th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Foxit Software Inc.	pdfonline.foxit.com	before 2026‑02‑03	—	No fix listed	CNA

pdfonline.foxit.com VendorFoxit Software Inc. Affected before 2026‑02‑03 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:foxit:pdf_editor_cloud::::::::	before 2026-02-03	Vulnerable	Foxit

cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:* Versions before 2026-02-03 Vulnerable ·Foxit

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-1591
2026-10-03 Alias added: GHSA-g4wf-v389-9w53

References

Advisory 1

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

TI-2011-04633 Foxit PDF Reader < 4.3.1.0218 JavaScript File Write CVSS 4.0HIGH 8.4
TI-2016-06851 Out-of-bounds read in Foxit Reader CVSS 3.0MEDIUM 6.8
TI-2018-02932 Use after free in Foxit PDF Reader CVSS 3.1HIGH 7.8
TI-2018-02965 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
TI-2018-02964 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
TI-2018-02962 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8

See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences