Immediate Jenkins upgrade required to resolve security vulnerability

I'd suggest taking a snapshot of all plugins before doing the upgrade
 

CVE Details:

XSS vulnerability in plugin manager 

SECURITY-3037 / CVE-2023-27898

Severity (CVSS): High

Description:
Jenkins 2.270 through 2.393 (both inclusive), LTS 2.277.1 through 2.375.3 (both inclusive) does not escape the Jenkins version a plugin depends on when rendering the error message stating its incompatibility with the current version of Jenkins in the plugin manager.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide plugins to the configured update sites and have this message shown by Jenkins instances.

https://www.jenkins.io/security/advisory/2023-03-08/