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6.3
MEDIUM CVSS 3.1
CVE-2026-1591
Stored XSS via Attachments Feature in https://pdfonline.foxit.com/
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.

INFO

Published Date :

Feb. 3, 2026, 8:16 a.m.

Last Modified :

Feb. 3, 2026, 4:44 p.m.

Remotely Exploit :

Yes !

Source :

14984358-7092-470d-8f34-ade47a7658a2
Affected Products

The following products are affected by CVE-2026-1591 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Foxit pdf_editor_cloud
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 14984358-7092-470d-8f34-ade47a7658a2
CVSS 3.1 MEDIUM MITRE-CVE
Solution
Update Foxit PDF Editor Cloud to a version that addresses the stored XSS vulnerability in file uploads.
  • Update Foxit PDF Editor Cloud to version 2026-02-01 or later.
  • Validate that uploaded filenames are properly escaped.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-1591.

URL Resource
https://www.foxit.com/support/security-bulletins.html
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-1591 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-1591 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-1591 vulnerability anywhere in the article.

  • The Cyber Express
Foxit Releases Security Updates for PDF Editor Cloud XSS Vulnerabilities

Foxit Software has released security updates addressing multiple cross-site scripting (XSS) vulnerabilities affecting Foxit PDF Editor Cloud and Foxit eSign, closing gaps that could have allowed attac ... Read more

Published Date: Feb 04, 2026 (3 days, 2 hours ago)
  • CybersecurityNews
Foxit PDF Editor Vulnerabilities Let Attackers Execute Arbitrary JavaScript

Security updates addressing critical cross-site scripting (XSS) vulnerabilities in Foxit PDF Editor Cloud that could allow attackers to execute arbitrary JavaScript code in users’ browsers. The vulner ... Read more

Published Date: Feb 03, 2026 (3 days, 16 hours ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-1591 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 14984358-7092-470d-8f34-ade47a7658a2

    Feb. 03, 2026

    Action Type Old Value New Value
    Changed 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 2026‑02‑01. 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.
  • New CVE Received by 14984358-7092-470d-8f34-ade47a7658a2

    Feb. 03, 2026

    Action Type Old Value New Value
    Added 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 2026‑02‑01.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
    Added CWE CWE-79
    Added Reference https://www.foxit.com/support/security-bulletins.html
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact