CVE-2021-34621

Name: CVE-2021-34621
Creator: NVD / NIST
Published: 2021-07-07T13:15:08.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 68.86%

Last modified Jun 17, 2026

CVE-2021-34621 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in the user registration component found in the ~/src/Classes/RegistrationAuth.php file of the ProfilePress WordPress plugin made it possible for users to register on sites as an administrator. This issue affects versions 3.0.0 - 3.1.3. EPSS estimates a 68.86% chance of exploitation in the next 30 days.

Description

A vulnerability in the user registration component found in the ~/src/Classes/RegistrationAuth.php file of the ProfilePress WordPress plugin made it possible for users to register on sites as an administrator. This issue affects versions 3.0.0 - 3.1.3. .

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

68.86%

99.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Properfraction	Profilepress	>= 3.0.0, <= 3.1.3

References

http://packetstormsecurity.com/files/163973/WordPress-ProfilePress-3.1.3-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.wordfence.com/blog/2021/06/easily-exploitable-critical-vulnerabilities-patched-in-profilepress-plugin/Exploit, Third Party Advisory
http://packetstormsecurity.com/files/163973/WordPress-ProfilePress-3.1.3-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.wordfence.com/blog/2021/06/easily-exploitable-critical-vulnerabilities-patched-in-profilepress-plugin/Exploit, Third Party Advisory

Timeline

Published: Jul 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34621?

How severe is CVE-2021-34621?

CVE-2021-34621 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 68.86% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34621?

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-2021-34621?

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

Scan your code now

Source: NVD / NIST