CVE-2025-26576

High

Published: 26 March 2025

Published

26 March 2025

Modified

23 April 2026

KEV Added

—

Patch

—

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 0.0011 29.9th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-26576 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 Browser Session Hijacking (T1185); ranked at the 29.9th 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-2025-26576 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WP Simple Slideshow plugin (wp-simple-slideshow) for WordPress developed by takumin. The issue affects all versions of WP Simple Slideshow from n/a through 1.0 inclusive. Published on 2025-03-26, it 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).

Attackers can exploit this vulnerability remotely over the network with low attack complexity and no required privileges, though it demands user interaction such as clicking a malicious link. Exploitation enables limited impacts on confidentiality, integrity, and availability within a changed scope, allowing execution of arbitrary scripts in the context of the affected user's browser session.

Patchstack has published an advisory with details on this vulnerability, available at https://patchstack.com/database/Wordpress/Plugin/wp-simple-slideshow/vulnerability/wordpress-wp-simple-slideshow-plugin-1-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-8165

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in takumin WP Simple Slideshow wp-simple-slideshow allows Reflected XSS.This issue affects WP Simple Slideshow: from n/a through <= 1.0.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1185 Browser Session Hijacking Collection

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.

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 allows arbitrary JavaScript execution in the victim's browser via malicious link, directly enabling browser session hijacking (T1185) and stealing web session cookies (T1539).

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