Quick answers
- Is CVE-2026-109873 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109873 being exploited in the wild.
- How severe is CVE-2026-109873?
- Informational severity, published 11 November 2026.
- Which products and versions are affected?
- Wordpress User Registration & Membership before 5.3.2.
- Is there a fix for CVE-2026-109873?
- Yes: fixed in 5.3.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-109873 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-109873?
- Check whether you run Wordpress User Registration & Membership at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 5.3.2
Technical details
The plugin contains an authentication bypass vulnerability (CWE-287) in its payment-before-login validation logic. When a registration form submission omits the membership field entirely, the plugin fails to enforce its payment-gating restriction, allowing unauthenticated account creation and immediate login. The vulnerability affects versions before 5.3.2 and is exploitable over the network without authentication or user interaction beyond crafting a registration request.
Affected products
- WordPress User Registration & Membership before 5.3.2
Timeline
- 2026-11-09: disclosed
- 2026-11-09: advisory