CVE-2021-20325

Name: CVE-2021-20325
Creator: NVD / NIST
Published: 2022-02-18T18:15:09.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.57%

Last modified Jun 17, 2026

CVE-2021-20325 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a security regression compared to the versions shipped in Red Hat Enterprise Linux 8.4. A user who installs or updates to Red Hat Enterprise Linux 8.5.0 would be vulnerable to the mentioned CVEs, even if they were properly fixed in Red Hat Enterprise Linux 8.4. EPSS estimates a 1.57% chance of exploitation in the next 30 days.

Description

Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a security regression compared to the versions shipped in Red Hat Enterprise Linux 8.4. A user who installs or updates to Red Hat Enterprise Linux 8.5.0 would be vulnerable to the mentioned CVEs, even if they were properly fixed in Red Hat Enterprise Linux 8.4. CVE-2021-20325 was assigned to that Red Hat specific security regression and it does not affect the upstream versions of httpd.

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

1.57%

72.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Enterprise Linux	8.5.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=2017321Issue Tracking, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2017321Issue Tracking, Vendor Advisory

Timeline

Published: Feb 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20325?

How severe is CVE-2021-20325?

CVE-2021-20325 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20325?

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-2021-20325?

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

Scan your code now

Source: NVD / NIST