CVE-2021-1628

Name: CVE-2021-1628
Creator: NVD / NIST
Published: 2021-03-26T17:15:12.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-1628 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. MuleSoft is aware of a XML External Entity (XXE) vulnerability affecting certain versions of a Mule runtime component that may affect both CloudHub and on-premise customers. Affected versions: Mule 4.x runtime released before February 2, 2021.. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

MuleSoft is aware of a XML External Entity (XXE) vulnerability affecting certain versions of a Mule runtime component that may affect both CloudHub and on-premise customers. Affected versions: Mule 4.x runtime released before February 2, 2021.

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

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Salesforce	Mule	>= 4.0.0, <= 4.2.2

References

https://help.salesforce.com/articleView?id=000357384&type=1&mode=1Vendor Advisory
https://help.salesforce.com/articleView?id=000357384&type=1&mode=1Vendor Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1628?

How severe is CVE-2021-1628?

CVE-2021-1628 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1628?

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-2021-1628?

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

Scan your code now

Source: NVD / NIST