Download Manager icon attributes let Contributors store JavaScript

Download Manager through 3.3.66 emits the icon attribute of its category shortcode without adequate escaping. A Contributor can store a payload inside the shortcode attribute that bypasses save-time wp_kses_post() and executes when the shortcode renders for a visitor or Administrator.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Download Manager
Plugin slug: download-manager
Affected: <= 3.3.66
Safe version: > 3.3.66
Published: Aug 01, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Aug 01, 2026 and is one of 69 known issues for this plugin.

What to do

Update, patch or deactivate.

Update to a corrected release after 3.3.66. Review category shortcode icon attributes, remove payloads, and invalidate privileged sessions if affected pages were viewed.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'icon' Shortcode Attribute in all versions up to, and including, 3.3.66 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. wp_kses_post() does not neutralize the payload because it operates on post content at save time and does not process shortcode attribute values that are emitted unescaped at render time.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources

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