Public proof of conceptFix available

CVE-2015-8103

Q: Is CVE-2015-8103 actively exploited?

Active exploitation of CVE-2015-8103 has not been confirmed. Its EPSS score was 86.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2015-8103?

CVE-2015-8103 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2015-11-25
Fixed in1.638 · 1.625.2
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Jenkins CLI subsystem in Jenkins before 1.638 and LTS before 1.625.2 allows remote attackers to execute arbitrary code via a crafted serialized Java object, related to a problematic webapps/ROOT/WEB-INF/lib/commons-collections-*.jar file and the "Groovy variant in 'ysoserial'".

Timeline

dates in UTC

2015-11-2520:59CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-8103?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-8103?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Jenkins

Branch	Affected	Fixed in	Source
1.638	< 1.638	1.638	NVD
1.x	≥ 1.626, < 1.638	1.638	OSV
1.625	< 1.625.2	1.625.2	NVD · OSV

Redhat openshift container platform

Branch	Affected	Fixed in	Source
2.2	= 2.2	no fix published	NVD
3.1	= 3.1	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Jenkins to 1.638 · 1.625.2

Advisories and patches

wiki.jenkins-ci.orgVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: EDB-38983
Proof-of-concept repositories: 2 repositories, unverifiedcved-sources/cve-2015-8103r00t4dm/Jenkins-CVE-2015-8103

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score86.7 %read 2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23
Exploit-DBdetectionread 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2015-11-25
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2015-8103?

Is CVE-2015-8103 actively exploited?

Active exploitation of CVE-2015-8103 has not been confirmed. Its EPSS score was 86.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-8103?

CVE-2015-8103 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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