CVE-2025-55420

Name: CVE-2025-55420
Creator: NVD / NIST
Published: 2025-08-21T16:15:34.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2025-55420 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A Reflected Cross Site Scripting (XSS) vulnerability was found in /index.php in FoxCMS v1.2.6. When a crafted script is sent via a GET request, it is reflected unsanitized into the HTML response. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

A Reflected Cross Site Scripting (XSS) vulnerability was found in /index.php in FoxCMS v1.2.6. When a crafted script is sent via a GET request, it is reflected unsanitized into the HTML response. This permits execution of arbitrary JavaScript code when a logged-in user submits the malicious input.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.46%

36.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Foxcms	Foxcms	1.2.6

References

https://www.notion.so/FoxCMS-V1-2-6-Reflected-XSS-in-index-php-2222b2fd021080589d27ef8e1b9ebd86?source=copy_linkExploit, Third Party Advisory

Timeline

Published: Aug 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-55420?

How severe is CVE-2025-55420?

CVE-2025-55420 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55420?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-55420?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST