CVE-2026-121870 Simpler Checkout < 1.5.4 - Subscriber+ Privilege Escalation via Forged Auto-Login Token
Subscribers on stores not yet configured can forge auto-login tokens to log in as administrator; WordPress stores using Simpler Checkout should care.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-121870?
CVE-2026-121870 is a high-severity privilege escalation vulnerability in Unknown Simpler Checkout, published on 11 Nov 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Simpler Checkout WordPress plugin before 1.5.4 does not properly restrict who can create orders and checks its automatic login link with a key that stays empty until the store owner configures the Simpler Checkout WordPress plugin before 1.5.4, allowing subscribers on stores that have not completed setup to log in as an administrator.
Weakness: CWE-269
Which versions are affected by CVE-2026-121870?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-121870?
No fix has been published for CVE-2026-121870 yet. Limit exposure of the affected software until one is available.
Upgrade, and run services with the fewest rights they need. More about Privilege escalation.
Is CVE-2026-121870 being exploited?
There is no known exploitation of CVE-2026-121870 in the wild and no public exploit code.
Sources
Also known as GHSA-hh27-gq4q-7xq8.