CVE-2026-8848 Missing authorization in Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder
Authenticated editors can install arbitrary plugins via a legacy endpoint if a valid Pro license is active but not installed, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8848?
CVE-2026-8848 is a high-severity missing authorization vulnerability in danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder, published on 9 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.22.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with editor-level access and above, to install and activate an arbitrary plugin from an attacker-controlled URL, leading to remote code execution. Exploitation requires that a valid Popup Maker Pro license is active on the target site and that Popup Maker Pro is not yet installed, as these conditions are necessary for the legacy v1/connect/info endpoint to issue the bearer token used to satisfy the install endpoint's only non-spoofable validation check.
Weakness: CWE-862
Which versions are affected by CVE-2026-8848?
How do I fix CVE-2026-8848?
No fix has been published for CVE-2026-8848 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-8848 being exploited?
There is no known exploitation of CVE-2026-8848 in the wild and no public exploit code.
Sources
Also known as GHSA-hjcg-vxr5-fgc7.