CVE-2026-28083 MEDIUM

CVE-2026-28083: WordPress Flatsome theme <= 3.20.5 - Cross Site Scripting (XSS) vulnerability

Vendor Ux-Themes
Product Flatsome
Weakness CWE-79 · XSS
Published February 26, 2026
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/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 UX-themes Flatsome flatsome allows Stored XSS.This issue affects Flatsome: from n/a through <= 3.20.5.

Explanation of Vulnerability in Simple Terms

02Summary

Flatsome versions up to 3.20.5 contain a stored cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. When a victim visits a page containing the injected code, the script executes in their browser with the same permissions as the victim. The vulnerability requires user interaction and can affect other users on the site.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute when other users view affected pages, potentially stealing session tokens or performing actions on their behalf.

Potential impact on your site

04Site Impact

Authenticated users can inject persistent malicious code affecting other site visitors; requires immediate patching and audit of user-generated content.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege account (e.g., subscriber or contributor) and the victim must visit a page containing the injected code.

Key dates

06Disclosure timeline

February 26, 2026 CVE published
April 28, 2026 Record updated