CVE-2021-24353: Simple 301 Redirects by BetterLinks - 2.0.0 – 2.0.3 - Unauthenticated Redirect Import

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-14 · updated 2026-06-17
Weakness: CWE-862

Description

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.

Affected products

Simple 301 Redirects by BetterLinks: from 2.0.0 before 2.0.4 — fixed in 2.0.4

How to fix

Upgrade to a fixed version: Simple 301 Redirects by BetterLinks 2.0.4. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/74c23d56-e81f-47e9-bf8b-33d3f0e81894
https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/
https://wpscan.com/vulnerability/74c23d56-e81f-47e9-bf8b-33d3f0e81894
https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/

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