CVE-2026-107887 Advanced Twenty Seventeen <= 1.3.1 - Subscriber+ Site Theme Switch via ats_create_child_theme
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-107887?
CVE-2026-107887 is a medium-severity vulnerability in Unknown Advanced Twenty Seventeen, published on 24 Oct 2026.
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-107887?
How do I fix CVE-2026-107887?
No fix has been published for CVE-2026-107887 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107887 being exploited?
There is no known exploitation of CVE-2026-107887 in the wild and no public exploit code.
Sources
Also known as GHSA-q8c9-qpq5-4xhg.