Jenkins 2.196 and earlier, LTS 2.176.3 and earlier printed the value of the "Cookie" HTTP request header on the /whoAmI/ URL, allowing attac

Summary

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier printed the value of the "Cookie" HTTP request header on the /whoAmI/ URL, allowing attackers exploiting another XSS vulnerability to obtain the HTTP session cookie despite it being marked HttpOnly.

Timeline

1. Sep 25, 2019, 3:05 PM UTCCVE published
2. Aug 4, 2024, 10:24 PM UTCRecord last updated
3. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Jenkins project Jenkins

  Version range not reported

• org.jenkins-ci.main:jenkins-coreMaven

  fixed in 2.176.4

• org.jenkins-ci.main:jenkins-coreMaven

  From 2.177 · fixed in 2.197

References 3