Simple 301 Redirects 2.0.0 - 2.0.3 - Unauthenticated Redirect Export
Strategic Overview
- Status
- Patched in 2.0.4
- Affected Plugin
- Simple 301 Redirects By BetterLinks – Easy WordPress Redirect Manager for Redirects, 404 Error Log & More
- Affected Version
2.0.0 – 2.0.3- CVSS
- 8.8High
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2021-24352
At a glance
CVE-2021-24352 is a high-severity Missing Authorization vulnerability in the Simple 301 Redirects By BetterLinks WordPress plugin, affecting versions 2.0.0 – 2.0.3. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high availability impact). Exploitation requires no authentication. The issue is fixed in version 2.0.4; sites on affected versions should update now. Disclosed May 2021, reported by Chloe Chamberland.
Vulnerability Overview
The export_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4 had no capability or nonce checks making it possible for unauthenticated users to export a site's redirects.
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. A successful exploit has high impact on availability.
CWE-862: Missing Authorization
Reaching this weakness in Simple 301 Redirects By BetterLinks 2.0.0 – 2.0.3 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 Simple 301 Redirects By BetterLinks the fix is 2.0.4: builds 2.0.0 – 2.0.3 are affected, anything from 2.0.4 onward is not.
Remediation
Update to version 2.0.4, 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: Simple 301 Redirects By BetterLinks 2.0.4 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Simple 301 Redirects By BetterLinks – Easy WordPress Redirect Manager for Redirects, 404 Error Log & More
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