How severe is CVE-2021-20453?

High severity. CVSS v3 base score is 8.2 out of 10.

Is CVE-2021-20453 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ibm Websphere Application Server

CVE-2021-20453

IBM WebSphere Application Server 8.0, 8.5, and 9.0 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory…

EPSS: 0.001 (24.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.0/S:U/PR:N/UI:N/AC:L/I:N/C:H/A:L/AV:N/RC:C/RL:O/E:U.

Affected products

Ibm Websphere Application Server — versions 8.0, 8.5, 9.0

Public proof-of-concept exploits

r00t4dm/r00t4dm

References

www.ibm.com/support/pages/node/6445171 (x_refsource_CONFIRM)
ibm-was-cve202120453-xxe (196648) (vdb-entry, x_refsource_XF)

Frequently asked questions

What is CVE-2021-20453?: CVE-2021-20453 is a high-severity vulnerability in Ibm Websphere Application Server. CVSS score: 8.2/10. Published 2021-04-20.
How severe is CVE-2021-20453?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-20453 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.