Quick answers
- Is CVE-2026-120840 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120840 being exploited in the wild.
- How severe is CVE-2026-120840?
- Medium severity, with a CVSS score of 4.3, published 7 November 2026.
- Which products and versions are affected?
- ThemeGrill User Registration through 5.3.0.
- Is there a fix for CVE-2026-120840?
- Yes: fixed in 5.3.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-120840 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120840?
- Check whether you run ThemeGrill User Registration 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: 5.3.1
Technical details
The plugin fails to properly enforce access controls on certain pages or actions, allowing authenticated users with subscriber-level privileges to perform operations beyond their intended permission scope. The vulnerability affects plugin versions through 5.3.0 and requires the attacker to be authenticated as a subscriber-level user. A fix is available in version 5.3.1.
Affected products
- ThemeGrill User Registration through 5.3.0
Timeline
- 2026-10-30: disclosed
- 2026-11-07: advisory