CVE-2021-37598

Name: CVE-2021-37598
Creator: NVD / NIST
Published: 2021-08-19T19:15:07.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.35%

Last modified Jun 17, 2026

CVE-2021-37598 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.. EPSS estimates a 2.35% chance of exploitation in the next 30 days.

Description

WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.35%

81.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

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-2021-0024/FEYE-2021-0024.mdExploit, Third Party Advisory
https://github.com/fireeye/Vulnerability-DisclosuresThird Party Advisory
https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0024/FEYE-2021-0024.mdExploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-37598?

WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.

How severe is CVE-2021-37598?

CVE-2021-37598 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37598?

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-2021-37598?

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

Scan your code now

Source: NVD / NIST