CVE-2026-25342
Published: 25 March 2026
Summary
CVE-2026-25342 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 11.8th 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-15 (Information Output Filtering) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates the reflected XSS vulnerability by requiring timely patching to Boutique theme version 2.4.6 or later.
Prevents exploitation by filtering or encoding unneutralized user inputs during web page generation to block script execution.
Addresses the vulnerability by validating inputs to reject or sanitize malicious XSS payloads before reflection.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress theme enables remote exploitation (T1190) via crafted malicious links delivered by spearphishing (T1566.002/T1204.001), directly facilitating arbitrary JavaScript execution (T1059.007) and session cookie theft (T1539).
NVD Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in kutethemes Boutique kute-boutique allows Reflected XSS.This issue affects Boutique: from n/a through < 2.4.6.
Deeper analysisAI
CVE-2026-25342 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as CWE-79 (Cross-site Scripting), specifically a Reflected XSS issue in the kutethemes Boutique (kute-boutique) WordPress theme. It affects all versions of the Boutique theme from n/a through those prior to 2.4.6. The vulnerability has 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 high severity due to network accessibility, low attack complexity, no required privileges, user interaction, and changed scope with low impacts on confidentiality, integrity, and availability.
Attackers can exploit this vulnerability remotely over the network without authentication by crafting malicious input that is reflected back in the web page without proper neutralization. Exploitation requires tricking an authenticated user, such as a site visitor or administrator, into interacting with a malicious link or payload (e.g., via phishing or social engineering). Successful exploitation allows the attacker to execute arbitrary scripts in the victim's browser context, potentially stealing session cookies, sensitive data, or performing actions on behalf of the user within the site's scope, leveraging the changed scope for broader impact.
The Patchstack advisory for this vulnerability confirms it was addressed in Boutique theme version 2.4.6, recommending immediate updates to patched versions for mitigation. Security practitioners should verify theme versions on affected WordPress sites and apply the update, while also implementing general XSS protections like Content Security Policy (CSP) headers where possible.
Details
- CWE(s)