CVE-2025-53349 HIGH

CVE-2025-53349: WordPress Kalium Theme <= 3.18.3 - Cross Site Scripting (XSS) Vulnerability

Vendor Laborator

Product Kalium

Weakness CWE-79 · XSS

Published November 6, 2025

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

7.1/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Laborator Kalium kalium allows Reflected XSS.This issue affects Kalium: from n/a through <= 3.18.3.

Explanation of Vulnerability in Simple Terms

02Summary

Kalium versions up to 3.18.3 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into web pages. The vulnerability requires user interaction—typically clicking a malicious link—and can affect multiple users across the site. An attacker can steal session cookies, redirect users, or deface content visible to site visitors.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute in visitors' browsers, stealing cookies or redirecting users.

Potential impact on your site

04Site Impact

Visitors may have sessions hijacked, be redirected to phishing sites, or see defaced content.

Conditions required to exploit

05Prerequisites

No authentication required. Victim must click a malicious link or visit an attacker-controlled page.

Key dates

06Disclosure timeline

November 6, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-53349 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

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