CVE-2020-2103

MEDIUMNVD 5.45.4—Elevated

5.4

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.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 97.7%
KEV: Not listed

Published

January 29, 2020

Last Modified

November 21, 2024

References (12)

jenkinsci-cert@googlegroupshttp://www.openwall.com/lists/oss-security/2020/01/29/1
jenkinsci-cert@googlegroupshttps://access.redhat.com/errata/RHBA-2020:0402
jenkinsci-cert@googlegroupshttps://access.redhat.com/errata/RHBA-2020:0675
jenkinsci-cert@googlegroupshttps://access.redhat.com/errata/RHSA-2020:0681
jenkinsci-cert@googlegroupshttps://access.redhat.com/errata/RHSA-2020:0683
jenkinsci-cert@googlegroupshttps://jenkins.io/security/advisory/2020-01-29/#SECURITY-1695
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/01/29/1
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHBA-2020:0402
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHBA-2020:0675
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0681
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2020:0683
af854a3a-2127-422b-91ae-364da2661108https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1695

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	jenkins-0:2.204.2.1583446818-1.el7	2020-03-10	redhat
redhat	openshift-kuryr-0:3.11.170-1.git.1.7265da1.el7	2020-02-19	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.jenkins-ci.main:jenkins-core	1.396 ... 2.99 (580 versions)	2.204.2	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 08:28 UTCEG score recompute
2026-05-27 08:28 UTCVendor advisory
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-24 14:51 UTCOSV refresh

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2020/CVE-2020-2103.yaml
First seen Jan 1, 2020
Jenkins <=2.218 - Information Disclosure
Open source ↗

Frequently asked(5)

What is CVE-2020-2103?

CVE-2020-2103 is a medium vulnerability published on January 29, 2020. 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.

When was CVE-2020-2103 disclosed?

CVE-2020-2103 was first published in the National Vulnerability Database on January 29, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-2103 actively exploited?

CVE-2020-2103 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-2103?

CVE-2020-2103 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2020-2103?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-2103, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-2103

Explore →

Is Your Infrastructure Affected by CVE-2020-2103?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2020-2103

Published

Last Modified

References (12)

Patch Availability(2)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-2103?

Same vendor

Same CWE

CVE-2020-2103

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(2)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-2103?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (12)

Frequently asked(5)

Related CVEs(same vendor + same CWE)