CVE-2021-21656

Name: CVE-2021-21656
Creator: NVD / NIST
Published: 2021-05-11T15:15:08.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2021-21656 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. Jenkins Xcode integration Plugin 2.0.14 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

Jenkins Xcode integration Plugin 2.0.14 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

Metrics

CVSS 3.1

7.1/10

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

EPSS Probability

1.51%

71.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Jenkins	Xcode Integration	<= 2.0.14

References

https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2335Vendor Advisory
https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2335Vendor Advisory

Timeline

Published: May 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21656?

Jenkins Xcode integration Plugin 2.0.14 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

How severe is CVE-2021-21656?

CVE-2021-21656 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21656?

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-2021-21656?

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

Scan your code now

Source: NVD / NIST