Simple 301 Redirects 2.0.0 - 2.0.3 - Unauthenticated Redirect Import
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-284 · Improper Access Control
- CVE
CVE-2021-24353
At a glance
CVE-2021-24353 is a high-severity Improper Access Control 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 import_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 import a set of site 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-284: Improper Access Control
Reaching this weakness in Simple 301 Redirects By BetterLinks 2.0.0 – 2.0.3 takes no account at all. Improper access control means the code decides what a caller may do using something other than their actual permissions, so the decision can be wrong without any check appearing to be missing.
Whoever can shape the request decides the answer, so the protected action runs for callers the code never meant to allow. 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
Other vulnerabilities in Simple 301 Redirects By BetterLinks – Easy WordPress Redirect Manager for Redirects, 404 Error Log & More
- 8.8CVE-2021-24352: Simple 301 Redirects 2.0.0 - 2.0.3 Redirect Export
CVE-2021-24352 - 8.8CVE-2021-24354: Simple 301 Redirects… Arbitrary Plugin Installation
CVE-2021-24354 - 8.8CVE-2021-24356: Simple 301 Redirects… Arbitrary Plugin Activation
CVE-2021-24356 - 5.4Simple 301 Redirects <= 2.0.7 Cross-Site Request Forgery via 'clicked'
- 4.3CVE-2023-47761: Simple 301 Redirects… Missing Authorization
CVE-2023-47761
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