[KEV] Unsafe Deserialization in Jenkins Stapler Web Framework (CVE-2018-1000861)
Summary
Vulnerability in Jenkins Stapler Web Framework (CVE-2018-1000861). Risk of unauthorized operations or information disclosure. Listed in CISA KEV — actively exploited.
Original description
The description as published by the source.
A code execution vulnerability exists in the Stapler web framework used by Jenkins
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2018-1000861 was discovered in Jenkins Stapler Web Framework.
In plain terms, it is an unsafe deserialization flaw.
Severity is High. If exploited, attackers can leak data or disrupt key functionality.
Note: CISA has officially listed this as actively exploited in the wild. Treat it with higher urgency than usual.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "Jenkins Stapler Web Framework CVE-2018-1000861".
CVE-2018-1000861 (Jenkins Stapler Web Framework). Severity: High. Category: CWE-502.
Listed in CISA KEV — actively exploited in the wild. Patch as a top priority.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2018-1000861) in Jenkins Stapler Web Framework. In plain words, it is an unsafe deserialization flaw.
Target versions of Jenkins Stapler Web Framework (see vendor advisory). If running in production, identify exposure immediately.
Severity: High. If exploited, attackers can leak data or disrupt key functionality. Listed in CISA KEV (confirmed exploitation in the wild).
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-502)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.依存マニフェストで影響コンポーネントを特定する。
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4Consider incident declaration escalate
Notify SOC / on-callCISA KEV登録済 = 実環境で悪用が観測されている。Step 3 で兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- advisory NVD