CVE-2026-107887
Advanced Twenty Seventeen <= 1.3.1 - Subscriber+ Site Theme Switch via ats_create_child_theme
Unknown Advanced Twenty Seventeen
CVSS
5.4MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.13%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 24 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
What fixes it
No source in this snapshot names a fixed version.
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.
Text from CVE List
Affected versions 1
- Advanced Twenty Seventeenaffected: all versions through 1.3.1CVE List