High
Security advisory
A unauthorized modification of configuration vulnerability exists in Jenkins 2.132 and earlier, 2.121.1 and earlier in User.java that allows attackers to provide crafted login credentials that cause Jenkins to move the config.xml file from the Jenkins home directory. If Jenkins is started without this file present, it will revert to the legacy defaults of granting administrator access to anonymous users.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-1999001
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:01 UTC · Revision 1
Source evidence
A unauthorized modification of configuration vulnerability exists in Jenkins 2.132 and earlier, 2.121.1 and earlier in User.java that allows attackers to provide crafted login credentials that cause Jenkins to move the config.xml file from the Jenkins home directory. If Jenkins is started without this file present, it will revert to the legacy defaults of granting administrator access to anonymous users.
osv:CVE-2018-1999001
Complete source record
{
"id": "9abb3cd1df154666fe0e6a4ec2c9e0dee02430db8417dd50ed9273de55f70b7e",
"url": "https://osv.dev/vulnerability/CVE-2018-1999001",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-1999001",
"summary": "A unauthorized modification of configuration vulnerability exists in Jenkins 2.132 and earlier, 2.121.1 and earlier in User.java that allows attackers to provide crafted login credentials that cause Jenkins to move the config.xml file from the Jenkins home directory. If Jenkins is started without this file present, it will revert to the legacy defaults of granting administrator access to anonymous users.",
"evidence": "osv:CVE-2018-1999001",
"products": [],
"severity": "high",
"structured": {
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"aliases": [
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"GHSA-j8qv-mj4r-6fw4"
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}
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}
],
"modified": "2026-10-24T10:30:34.385742887Z",
"provider": "osv",
"references": [
"https://jenkins.io/security/advisory/2018-07-18/#SECURITY-897",
"https://www.oracle.com/security-alerts/cpuapr2022.html"
],
"provider_metadata": {
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"evidence": "/id"
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433502,
"published_at": "2018-07-23T19:29:00.237+00:00"
}