Vchasno Kasa <= 1.0.3 - Missing Authorization to Unauthenticated Invoice Generation
Strategic Overview
- Status
- Patched in 1.0.4
- Affected Plugin
- MORKVA Vchasno Kasa Integration
- Affected Version
<= 1.0.3- CVSS
- 5.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2025-6721
At a glance
CVE-2025-6721 is a medium-severity Missing Authorization vulnerability in the MORKVA Vchasno Kasa Integration WordPress plugin, affecting versions <= 1.0.3. 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 1.0.4; sites on affected versions should update now. Disclosed July 2025, reported by Poli.
Vulnerability Overview
The Vchasno Kasa plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the mrkv_vchasno_kasa_wc_do_metabox_action() function in all versions up to, and including, 1.0.3. This makes it possible for unauthenticated attackers to generate invoices for arbitrary orders.
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-862: Missing Authorization
MORKVA Vchasno Kasa Integration <= 1.0.3 carries this weakness at mrkv_vchasno_kasa_wc_do_metabox_action(), and reaching it takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For MORKVA Vchasno Kasa Integration the fix is 1.0.4: builds <= 1.0.3 are affected, anything from 1.0.4 onward is not.
Remediation
Update to version 1.0.4, 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: MORKVA Vchasno Kasa Integration 1.0.4 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
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