What is the CVSS score of CVE-2026-28083?

CVE-2026-28083 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

Which versions of UX-themes Flatsome are affected by CVE-2026-28083?

CVE-2026-28083 presents notable security risk, a cross-site scripting vulnerability rated CVSS 6.5. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

How to fix or mitigate CVE-2026-28083?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

UX-themes Flatsome CVE-2026-28083

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-26 audit@patchstack.com

XSS

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 26, 2026 - 09:16 nvd

MEDIUM 6.5

DescriptionCVE.org

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 <= 3.20.1.

AnalysisAI

Stored cross-site scripting in UX-themes Flatsome version 3.20.1 and earlier enables authenticated attackers to inject malicious scripts that execute in other users' browsers, potentially compromising session data or performing unauthorized actions. The vulnerability requires user interaction to trigger the stored payload, and no patch is currently available.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects UX-themes Flatsome flatsome. 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 <= 3.20.1.

Affected ProductsAI

Product: UX-themes Flatsome flatsome.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.