TillKit <= 1.0.4 - Unauthenticated Privileged POS Session Hijacking
Strategic Overview
- Status
- Patched in 1.0.5
- Affected Plugin
- TillKit – Mobile POS for WooCommerce
- Affected Version
<= 1.0.4- CVSS
- 5.3Medium
- Weakness type
- CWE-259 · Use of Hard-coded Password
- CVE
CVE-2026-91078
At a glance
CVE-2026-91078 is a medium-severity Use of Hard-coded Password vulnerability in the TillKit WordPress plugin, affecting versions <= 1.0.4. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.0.5; sites on affected versions should update now. Disclosed October 2026, reported by Pedro Pinho.
Vulnerability Overview
The TillKit plugin for WordPress is vulnerable to POS session hijacking in all versions up to, and including, 1.0.4. This is due to the software using a default pin code. This makes it possible for unauthenticated attackers to read customer and site-user personal data and modify store data..
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.
CWE-259: Use of Hard-coded Password
The product contains a hard-coded password, which it uses for its own inbound authentication or for outbound communication to external components.
Remediation
Update to version 1.0.5, or a newer patched version
How does WordSec protect against this?
This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: TillKit 1.0.5 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
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