Cyber Resilience

CVE-2025-28935

High

Published: 26 March 2025

Published
26 March 2025
Modified
23 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0021 43.9th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-28935 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 43.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).

Deeper analysis

CVE-2025-28935 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, affecting the Fancybox Plus WordPress plugin (fancybox-plus component) developed by puzich. This issue impacts all versions from n/a through 1.0.1, as published on 2025-03-26.

The vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating exploitation is possible over the network with low attack complexity, no required privileges, but necessitating user interaction such as clicking a malicious link. Remote attackers can deliver payloads via reflected inputs, enabling arbitrary script execution in the victim's browser context with changed scope, potentially compromising low levels of confidentiality, integrity, and availability, such as session hijacking or data theft.

The primary advisory from Patchstack (https://patchstack.com/database/Wordpress/Plugin/fancybox-plus/vulnerability/wordpress-fancybox-plus-plugin-1-0-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve) documents the Reflected XSS in Fancybox Plus version 1.0.1 for WordPress, providing details on the issue for practitioners to review mitigation guidance and available patches.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in puzich Fancybox Plus fancybox-plus allows Reflected XSS.This issue affects Fancybox Plus: from n/a through <= 1.0.1.

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 →
Why these techniques?

Reflected XSS in public-facing WordPress plugin directly enables exploitation of the web application (T1190) and arbitrary JavaScript execution in the browser (T1059.007).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-3231Shared CWE-79
CVE-2025-23481Shared CWE-79
CVE-2025-69302Shared CWE-79
CVE-2025-23734Shared CWE-79
CVE-2025-23571Shared CWE-79
CVE-2025-65110Shared CWE-79
CVE-2026-24948Shared CWE-79
CVE-2025-27352Shared CWE-79
CVE-2025-30349Shared CWE-79
CVE-2026-3876Shared CWE-79

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-15 Information Output Filtering good match
prevent

Filters information outputs to neutralize malicious scripts before rendering in web pages, directly preventing reflected XSS execution in the Fancybox Plus plugin.

SI-10 Information Input Validation good match
prevent

Validates reflected user inputs to ensure they are within expected formats, blocking malicious payloads targeting the improper neutralization flaw in Fancybox Plus.

SI-2 Flaw Remediation good match
prevent

Mandates timely identification, reporting, and patching of the specific XSS flaw affecting Fancybox Plus versions through 1.0.1.

References