CVE-2026-13733
Received Received - Intake

Stored XSS in WordPress Download Manager Plugin

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: Wordfence

Description
The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'no_data_msg' Shortcode Attribute in all versions up to, and including, 3.3.60 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Although wp_kses_post is applied to post content on save, it only strips HTML tokens and does not neutralize C-style escape sequences embedded within shortcode attribute values, meaning contributors can craft a payload that survives the kses filter and is silently reconstructed into a raw script tag at render time.

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Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-13733
EUVD
EUVD-2026-40923

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wordfence download_manager to 3.3.60 (inc)

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Exploitability

CWE
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KEV
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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.

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Executive Summary

The Download Manager plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the 'no_data_msg' shortcode attribute in all versions up to and including 3.3.60. This vulnerability arises because the plugin does not properly sanitize input or escape output. Authenticated users with contributor-level access or higher can inject malicious web scripts into pages. These scripts execute whenever any user accesses the affected page.

Although WordPress applies the wp_kses_post filter to post content on save, which removes HTML tokens, it does not neutralize C-style escape sequences within shortcode attribute values. This allows attackers to craft payloads that bypass the filter and are reconstructed into raw script tags when the page is rendered.

Impact Analysis

This vulnerability can allow an attacker with contributor-level access to inject malicious scripts into WordPress pages. These scripts execute in the context of users who visit the infected pages, potentially leading to theft of user credentials, session hijacking, or unauthorized actions performed on behalf of users.

Because the attack requires contributor-level access, it assumes some level of trust or access to the WordPress backend, but once exploited, it can affect all users who view the compromised content.

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