TI-2025-35006 Aliases CVE-2025-55420 GHSA-x4w6-26rw-r6h9

A Reflected Cross Site Scripting (XSS) vulnerability was found in /index.php in FoxCMS…

HIGH 73CWE-79Published 2025-08-21 · Updated 2025-08-21

Key facts

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

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

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00493 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

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
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:foxcms:foxcms:1.2.6:::::::*	1.2.6	Vulnerable	Foxcms

cpe:2.3:a:foxcms:foxcms:1.2.6:*:*:*:*:*:*:* Versions 1.2.6 Vulnerable ·Foxcms

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-55420
2026-10-03 Alias added: GHSA-x4w6-26rw-r6h9

References

Exploit 1

https://www.notion.so/FoxCMS-V1-2-6-Reflected-XSS-in-index-php-2222b2fd021080589d27ef8e1b9ebd86?source=copy_link

TI-2025-32222 FoxCMS <=v1.2.5 is vulnerable to Code Execution in admin/template_file/editFile.html. CVSS 3.1CRITICAL 9.8
TI-2025-19143 An arbitrary file upload vulnerability in the component \controller\LocalTemplate.php of… CVSS 3.1CRITICAL 9.8
TI-2025-19142 FoxCMS v1.2.5 was discovered to contain a remote code execution (RCE) vulnerability via… CVSS 3.1CRITICAL 9.8
TI-2025-21034 An issue in FoxCMS v.1.2.5 allows a remote attacker to execute arbitrary code via the… CVSS 3.1CRITICAL 9.8
TI-2025-35007 In FoxCMS 1.2.6, there is a reflected Cross Site Scripting (XSS) vulnerability in /index.php/plus. CVSS 3.1HIGH 8.8
TI-2025-35005 FoxCMS 1.2.6, there is a Cross Site Scripting vulnerability in /index.php/article. CVSS 3.1HIGH 8.8

See all 14 →

Sources

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