CVE-2026-5357 Download Manager <= 3.3.52 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Authenticated attackers with contributor access can inject arbitrary scripts via shortcode attributes, leading to script execution in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5357?
CVE-2026-5357 is a medium-severity cross-site scripting vulnerability in codename065 Download Manager, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sid' parameter of the 'wpdm_members' shortcode in versions up to and including 3.3.52. This is due to insufficient input sanitization and output escaping on the user-supplied 'sid' shortcode attribute. The sid parameter is extracted without sanitization in the members() function and stored via update_post_meta(), then echoed directly into an HTML id attribute in the members.php template without applying esc_attr(). 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 the injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-5357?
How do I fix CVE-2026-5357?
No fix has been published for CVE-2026-5357 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-5357 being exploited?
There is no known exploitation of CVE-2026-5357 in the wild and no public exploit code.
Sources
Also known as GHSA-cwf6-258p-c2v5.