CVE-2021-37597

Name: CVE-2021-37597
Creator: NVD / NIST
Published: 2021-08-19T19:15:07.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2021-37597 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. WP Cerber before 8.9.3 allows MFA bypass via wordpress_logged_in_[hash] manipulation.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

WP Cerber before 8.9.3 allows MFA bypass via wordpress_logged_in_[hash] manipulation.

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

2.12%

79.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Wpcerber	Wp Cerber	< 8.9.3

References

https://github.com/fireeye/Vulnerability-DisclosuresThird Party Advisory
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0023/FEYE-2021-0023.mdExploit, Third Party Advisory
https://github.com/fireeye/Vulnerability-DisclosuresThird Party Advisory
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0023/FEYE-2021-0023.mdExploit, Third Party Advisory

Timeline

Published: Aug 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37597?

WP Cerber before 8.9.3 allows MFA bypass via wordpress_logged_in_[hash] manipulation.

How severe is CVE-2021-37597?

CVE-2021-37597 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37597?

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-2021-37597?

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

Scan your code now

Source: NVD / NIST