Quick answers
- Is CVE-2026-105882 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105882 being exploited in the wild.
- How severe is CVE-2026-105882?
- Medium severity, with a CVSS score of 6.5, published 15 October 2026.
- Which products and versions are affected?
- ThemeGrill User Registration 5.2.8 and earlier.
- Is there a fix for CVE-2026-105882?
- Yes: fixed in 5.3.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-105882 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-105882?
- 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: 5.3.0
Technical details
A stored cross-site scripting vulnerability exists in ThemeGrill User Registration through version 5.2.8, where input is not properly neutralized during web page generation. The vulnerability requires a subscriber-level account to inject malicious script, but the injected payload persists and executes in the context of other users' sessions. The vulnerability is fixed in version 5.3.0.
Affected products
- ThemeGrill User Registration 5.2.8 and earlier
Timeline
- 2026-10-15: disclosed
- 2026-10-13: advisory
- 2026-10-13: patched