What’s Vulnerable › Vulnerabilities

CVE-2021-24355: Simple 301 Redirects by BetterLinks - 2.0.0 – 2.0.3 - Update and Retrieve Wildcard Value

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% 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

In the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, the lack of capability checks and insufficient nonce check on the AJAX actions, simple301redirects/admin/get_wildcard and simple301redirects/admin/wildcard, made it possible for authenticated users to retrieve and update the wildcard value for 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/ce8f9648-30fb-4fb9-894e-879dc0f26f98
• https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/
• https://wpscan.com/vulnerability/ce8f9648-30fb-4fb9-894e-879dc0f26f98
• https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/

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