CVE-2026-88618

Deferred Deferred - Pending Action

Stored XSS in SmartAdmin File Upload

Publication date: 2026-09-15

Last updated on: 2026-09-22

Assigner: MITRE

Description

1024-lab SmartAdmin v3.30.0 contains a stored cross-site scripting vulnerability in its file upload functionality. This allows a remote attacker to execute arbitrary code.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-15

Last Modified

2026-09-22

Generated

2026-10-06

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-88618

EUVD

EUVD-2026-78814

Affected Vendors & Products

Vendor	Product	Version / Range
1024-lab	smartadmin	3.30.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in SmartAdmin v3.30.0. It allows an authenticated user with low privileges to upload malicious HTML content, such as a file containing JavaScript code. When another user accesses the stored file, the JavaScript executes in their browser security context.

Detection Guidance

Check for uploaded HTML files with suspicious JavaScript content. Inspect file uploads in SmartAdmin v3.30.0 for files like '1.html' containing executable scripts. Review server logs for unusual file upload activity or requests to untrusted files.

Impact Analysis

An attacker could steal session cookies, perform actions on behalf of users, or redirect users to malicious sites. Users accessing uploaded files may unknowingly execute harmful scripts, compromising their data or account.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's security rules. It may result in data breaches, non-compliance penalties, and loss of user trust.

Mitigation Strategies

Validate file extensions and content types strictly. Reject active HTML content in uploads. Generate storage filenames server-side. Serve untrusted files from an isolated origin. Use Content-Disposition and Content-Type headers properly. Apply X-Content-Type-Options: nosniff header.

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