CVE-2021-21610

Description

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.33%
Vendor Advisory jenkins.io
Affected: Jenkins project Jenkins
Published at:
Updated at:

References

Link Tags
https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2153 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-21610?
CVE-2021-21610 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21610?
To fix CVE-2021-21610, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21610 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21610 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21610?
CVE-2021-21610 affects Jenkins project Jenkins.
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