Cyber Resilience

CVE-2025-27005

High

Published: 22 January 2026

Published
22 January 2026
Modified
27 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 0.0006 20.3th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-27005 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 20.3th 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-2025-27005 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the LambertGroup HTML5 Video Player plugin (lbg-vp2-html5-bottom). This issue affects HTML5 Video Player versions from unknown initial release through 5.3.5. The vulnerability was published on 2026-01-22 and carries a CVSS v3.1 base score of 7.1.

Attackers can exploit this vulnerability remotely over the network (AV:N) with low attack complexity (AC:L), requiring no privileges (PR:N) but user interaction (UI:R), such as clicking a malicious link. The changed scope (S:C) enables potential impact beyond the initial user, achieving low effects on confidentiality, integrity, and availability (C:L/I:L/A:L). Exploitation typically allows injection of malicious scripts into web pages viewed by users, potentially leading to session hijacking, data theft, or further site compromise.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/lbg-vp2-html5-bottom/vulnerability/wordpress-html5-video-player-plugin-5-3-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve, which covers the WordPress plugin context.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup HTML5 Video Player lbg-vp2-html5-bottom allows Reflected XSS.This issue affects HTML5 Video Player: from n/a through <= 5.3.5.

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 →
Why these techniques?

Reflected XSS in public-facing WordPress plugin directly enables remote exploitation of a web application via crafted links requiring user interaction.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2021-47873Shared CWE-79
CVE-2026-7052Shared CWE-79
CVE-2024-56060Shared CWE-79
CVE-2025-49043Shared CWE-79
CVE-2026-40038Shared CWE-79
CVE-2024-56022Shared CWE-79
CVE-2025-68889Shared CWE-79
CVE-2026-1074Shared CWE-79
CVE-2025-22539Shared CWE-79
CVE-2025-22286Shared CWE-79

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly requires validation and neutralization of untrusted input before it is used in web page generation, blocking the reflected XSS payload in the video player plugin.

SI-15 Information Output Filtering good match
prevent

Requires filtering or encoding of information sent to users, preventing malicious scripts injected via the vulnerable lbg-vp2-html5-bottom parameter from executing.

SI-3 Malicious Code Protection partial match
preventdetect

Can detect or block malicious script code delivered through the reflected XSS vector before it reaches the browser.

References