Astra Security Suite – Firewall & Malware Scan <= 0.2 - Unauthenticated Arbitrary File Upload
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- Astra Security Suite – Firewall & Malware Scan
- Affected Version
<= 0.2- CVSS
- 8.1High
- Weakness type
- CWE-285 · Improper Authorization
- CVE
CVE-2025-11521
At a glance
CVE-2025-11521 is a high-severity Improper Authorization vulnerability in the Astra Security Suite WordPress plugin, affecting versions <= 0.2. It carries a CVSS score of 8.1 (reachable over the network; high confidentiality, integrity, availability impact). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed November 2025, reported by kr0d.
Vulnerability Overview
The Astra Security Suite – Firewall & Malware Scan plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient validation of remote URLs for zip downloads and an easily guessable key in all versions up to, and including, 0.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-285: Improper Authorization
Reaching this weakness in Astra Security Suite <= 0.2 takes no account at all. Improper authorization means a permission check exists but does not cover the case being exercised, so a caller who is allowed to do one thing is allowed to do a neighbouring thing as well.
A lower-privileged account performs an action reserved for a higher one, which on a multi-author or membership site means an ordinary user reaching administrative behaviour. No fixed build of this plugin is recorded for Astra Security Suite yet, so installs running <= 0.2 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
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. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Astra Security Suite – Firewall & Malware Scan
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