CVE-2021-24354

Name: CVE-2021-24354
Creator: NVD / NIST
Published: 2021-06-14T14:15:08.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.48%

Last modified Jun 17, 2026

CVE-2021-24354 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A lack of capability checks and insufficient nonce check on the AJAX action in the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, made it possible for authenticated users to install arbitrary plugins on vulnerable sites.. EPSS estimates a 1.48% chance of exploitation in the next 30 days.

Description

A lack of capability checks and insufficient nonce check on the AJAX action in the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, made it possible for authenticated users to install arbitrary plugins 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

1.48%

70.6th 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/8638b36c-6641-491f-b9df-5db3645e4668Exploit, 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/8638b36c-6641-491f-b9df-5db3645e4668Exploit, 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-2021-24354?

How severe is CVE-2021-24354?

CVE-2021-24354 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24354?

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-2021-24354?

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

Scan your code now

Source: NVD / NIST