Vulnerability · Published Oct 24, 2026 · Assigned by WPScan

CVE-2026-107887Advanced Twenty Seventeen <= 1.3.1 - Subscriber+ Site Theme Switch via ats_create_child_theme

Medium 5.4

In plain English

A medium-severity missing authorization in Advanced Twenty Seventeen from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.1%top 96.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Advanced Twenty Seventeen WordPress plugin through 1.3.1 does not perform any capability or nonce check on the action that creates and activates its bundled child , allowing any authenticated user such as a subscriber to switch the site's active site-wide, and allowing the same action to be triggered against any logged-in user including an administrator via CSRF.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Advanced Twenty Seventeen	0 – through 1.3.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

https://wpscan.com/vulnerability/e252c7ee-368d-4bfb-a964-06804747c162/ exploit, vdb-entry, technical-description