CVE-2026-103964 Information disclosure in Download Manager
Authenticated attackers can steal administrator session cookies via email template injection, leading to account takeover in the Download Manager WordPress plugin.
- 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-2026-103964?
CVE-2026-103964 is a medium-severity vulnerability in codename065 Download Manager, published on 10 Oct 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 Sensitive Information Exposure in all versions up to, and including, 3.3.71 via the 'first_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract the administrator's full Cookie header, including wordpress_logged_in_* session cookies, from the suspension email sent during the administrator's authenticated request, enabling full session hijack and account takeover. Exploitation requires an administrator to perform the Suspend action against the attacker's account, which causes the plugin to synchronously compile and send the suspension email inside the administrator's authenticated HTTP request — making the administrator's session cookies available to the template engine at send time.
Weakness: CWE-200
Which versions are affected by CVE-2026-103964?
How do I fix CVE-2026-103964?
No fix has been published for CVE-2026-103964 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103964 being exploited?
There is no known exploitation of CVE-2026-103964 in the wild and no public exploit code.
Sources
Also known as GHSA-qj64-pjpc-4f52.