CVE-2025-55998

High

Published: 08 September 2025

Published

08 September 2025

Modified

29 September 2025

KEV Added

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Patch

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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS Score 0.0006 17.5th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-55998 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Mezereon Smart Search And Filter. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 17.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-27145

Vulnerability details

A cross-site scripting (XSS) vulnerability in Smart Search & Filter Shopify and BigCommerce apps allows a remote attacker to execute arbitrary JavaScript in the web browser of a user, by including a malicious payload into several filter parameter

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.007 JavaScript Execution

Adversaries may abuse various implementations of JavaScript for execution.

attack.mitre.org →

T1539 Steal Web Session Cookie Credential Access

An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.

attack.mitre.org →

Why these techniques?

Reflected XSS in public-facing Shopify/BigCommerce app enables exploitation of public-facing applications (T1190), arbitrary JavaScript execution in victim browsers (T1059.007), and theft of session cookies/user data (T1539).