Quick answers
- Is CVE-2026-81583 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81583 being exploited in the wild.
- How severe is CVE-2026-81583?
- Medium severity, with a CVSS score of 5.4, published 2 September 2026.
- Which products and versions are affected?
- WPScan Theme My Login 7.0 through 7.1.15.
- Is there a fix for CVE-2026-81583?
- A patch was published on 2026-09-02: Fixed in version 7.2.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-81583 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-81583?
- Check whether you run WPScan Theme My Login 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.
Technical details
The vulnerability is an authorization bypass (CWE-269) in the plugin's multisite signup handling. The plugin processes site signup requests through a custom action handler that does not properly validate the network's registration settings before creating new sites. Attack vectors include: (1) a subscriber sending a POST request with signup parameters to bypass registration restrictions and create a site with administrator access, and (2) an unauthenticated user exploiting this when the network allows "logged in users may register" by providing an email address that receives an activation link, allowing account creation and site provisioning without authentication. No user interaction is required beyond sending HTTP requests. The vulnerability affects versions 7.0 through 7.1.15 and is fixed in version 7.2.0.
Affected products
- WPScan Theme My Login 7.0 through 7.1.15
Timeline
- 2026-08-31: disclosed
- 2026-09-02: patched: Fixed in version 7.2.0