What’s Vulnerable › Vulnerabilities

CVE-2021-24356: Simple 301 Redirects by BetterLinks - 2.0.0 – 2.0.3 - Arbitrary Plugin Activation

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% 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, a lack of capability checks and insufficient nonce check on the AJAX action, simple301redirects/admin/activate_plugin, made it possible for authenticated users to activate arbitrary plugins installed on vulnerable sites.

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/be356530-5e00-4f27-8177-b80f3c1ae6e8
• https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/
• https://wpscan.com/vulnerability/be356530-5e00-4f27-8177-b80f3c1ae6e8
• https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/

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