6.3

CVE-2025-66501: foxit software inc. pdfonline.foxit.com Cross-site Scripting

CVSS: 6.3v3.1MediumAnalyzed
Published 19-12-2025Last modified 19-12-2025
Open JSON

Vulnerability summary

CVE-2025-66501 is a medium (CVSS 6.3) Cross-site Scripting vulnerability in foxit software inc. pdfonline.foxit.com. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-12-2025
    PublishedVulnerability first disclosed.
  2. 19-12-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Foxit1 product
Foxit software inc.1 product

2 vendors · 2 products

References

1 links