CVE-2021-24355

Name: CVE-2021-24355
Creator: NVD / NIST
Published: 2021-06-14T14:15:08.763+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2021-24355 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.72%

49.2th 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/ce8f9648-30fb-4fb9-894e-879dc0f26f98Exploit, 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/ce8f9648-30fb-4fb9-894e-879dc0f26f98Exploit, 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-2021-24355?

How severe is CVE-2021-24355?

CVE-2021-24355 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24355?

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-2021-24355?

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

Scan your code now

Source: NVD / NIST