Quick answers
- Is CVE-2026-27061 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-27061 being exploited in the wild.
- How severe is CVE-2026-27061?
- Medium severity, with a CVSS score of 6.5, published 30 October 2026.
- Which products and versions are affected?
- ThemeGrill User Registration <= 5.3.0.
- Is there a fix for CVE-2026-27061?
- Yes: fixed in 5.3.1 or later. Until then: Update to version 5.3.1 or later immediately. If unable to update, use Patchstack or a similar WordPress security plugin to apply a mitigation rule that blocks attacks until patching is completed. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-27061 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-27061?
- 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 or later
Update to version 5.3.1 or later immediately. If unable to update, use Patchstack or a similar WordPress security plugin to apply a mitigation rule that blocks attacks until patching is completed.
Technical details
The vulnerability is a stored or reflected XSS flaw in the User Registration plugin affecting versions up to 5.3.0. Exploitation requires a subscriber-level user or higher to perform an action such as clicking a malicious link or submitting a crafted form. A successful attack allows injection of arbitrary JavaScript that executes in the context of other users' browsers, enabling credential theft or account hijacking.
Affected products
- ThemeGrill User Registration <= 5.3.0
Timeline
- 2026-10-30: disclosed
- 2026-10-30: patched: 5.3.1 released