WaratekVRT Sign in

CVE-2020-2103 Jenkins

Affected softwareJenkins
Severity5.4 Medium CVSS 3.1 2 scores
Fixed in2.219, 2.204.2
WeaknessInformation exposure (CWE-200)
Published29 Jan 2020
Updated17 Jun 2026

Description

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier exposed session identifiers on a user's detail object in the whoAmI diagnostic page.

Exploitation status

Working exploit published

A reviewed exploit catalogue lists ready-to-run exploit code for this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC 1 indexed Published artifacts you can open, in Nuclei.
  • EPSS 7.0% chance in 30 days
IndexArtifactStarsFirst seen
Nuclei Jenkins <=2.218 - Information Disclosure

Waratek protection

Mitigation candidate

A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.

  • Protection none
  • Action unverified
  • Review automated Inferred
  • Record active
Decided by The affected package being open source on Maven, so the fix can be read
Finding This CVE affects an open-source Java library published on Maven Central (Maven packages: org.jenkins-ci.main:jenkins-core), so it is squarely in ARMR's territory and the source needed to understand the defect is public. That makes it a candidate for an ARMR patch rule. No rule exists and none is scheduled: the diff between the affected and fixed versions has not been read, and a closer look may find no hook point ARMR can act on.

CVSS

5.4 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 5.4 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N NVD Primary published
CVSS 2.0 4.0 none AV:N/AC:L/Au:S/C:N/I:P/A:N NVD Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.jenkins-ci.main:jenkins-core 2.205 2.219 unbounded
org.jenkins-ci.main:jenkins-core 0 2.204.2 unbounded

Products and versions

2 products, 4 version entries
SourceVendorProductSchemeAffected versions
nvd jenkins jenkins generic ≤ 2.204.1 · ≤ 2.218
osv org.jenkins-ci.main jenkins-core generic < 2.204.2 · ≥ 2.205 and < 2.219

References

URLTags
https://github.com/jenkinsci/jenkins/commit/77f36f37f5e3cabd0e4ece16d46d7943454ed15b WEB
https://access.redhat.com/errata/RHBA-2020:0402 WEB
https://access.redhat.com/errata/RHBA-2020:0675 WEB
https://access.redhat.com/errata/RHSA-2020:0681 WEB
https://access.redhat.com/errata/RHSA-2020:0683 WEB
https://github.com/jenkinsci/jenkins PACKAGE
https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1695 WEB
http://www.openwall.com/lists/oss-security/2020/01/29/1 WEB

Timeline

Published2020-01-29By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.