CVE-2025-66501
Foxit pdfonline.foxit.com Stored Cross-Site Scripting in eSign Predefined Text Feature
Description
A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Predefined Text feature of the Foxit eSign section. A crafted payload can be stored via the Identity “First Name” field, which is later rendered into the DOM without proper sanitization. As a result, the injected script may execute when predefined text is used or when viewing document properties.
INFO
Published Date :
Dec. 19, 2025, 8:15 a.m.
Last Modified :
Dec. 19, 2025, 8:15 a.m.
Remotely Exploit :
Yes !
Source :
14984358-7092-470d-8f34-ade47a7658a2
Affected Products
The following products are affected by CVE-2025-66501
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.
No affected product recoded yet
CVSS Scores
| 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
- Sanitize all user-supplied input for 'First Name'.
- Implement context-aware output encoding for rendered text.
- Avoid rendering user-controlled data directly into the DOM.
- Validate and sanitize predefined text content.
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-2025-66501.
| 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-2025-66501 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-2025-66501
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-2025-66501 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-66501 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.
-
New CVE Received by 14984358-7092-470d-8f34-ade47a7658a2
Dec. 19, 2025
Action Type Old Value New Value Added Description A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Predefined Text feature of the Foxit eSign section. A crafted payload can be stored via the Identity “First Name” field, which is later rendered into the DOM without proper sanitization. As a result, the injected script may execute when predefined text is used or when viewing document properties. 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