CVE-2021-24356

Name: CVE-2021-24356
Creator: NVD / NIST
Published: 2021-06-14T14:15:08.82+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.00%

Last modified Jun 17, 2026

CVE-2021-24356 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 3.00% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.00%

85.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wpdeveloper	Simple 301 Redirects	>= 2.0.0, < 2.0.4

References

https://wpscan.com/vulnerability/be356530-5e00-4f27-8177-b80f3c1ae6e8Exploit, Third Party Advisory
https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/be356530-5e00-4f27-8177-b80f3c1ae6e8Exploit, Third Party Advisory
https://www.wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin/Exploit, Third Party Advisory

Timeline

Published: Jun 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24356?

How severe is CVE-2021-24356?

CVE-2021-24356 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24356?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24356?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST