CVE-2018-1000861: Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

How to check if you are exposed to CVE-2018-1000861

1. Find every Jenkins Stapler Web Framework system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
2. Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2018-1000861.

US federal agencies had to fix this by 2022-08-10. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Timeline

1. 2022-02-10 · Added to CISA's Known Exploited Vulnerabilities catalog
2. 2022-08-10 · Fix-by date for US federal agencies, passed 1,544 days ago

Weakness type

• CWE-502

More exploited Jenkins vulnerabilities

CISA lists 6 exploited Jenkins vulnerabilities. The closest matches:

• CVE-2017-1000353Jenkins Remote Code Execution VulnerabilityAdded 2025-10-02
• CVE-2024-23897Jenkins Command Line Interface (CLI) Path Traversal VulnerabilityAdded 2024-08-19
• CVE-2015-5317Jenkins User Interface (UI) Information Disclosure VulnerabilityAdded 2023-05-12
• CVE-2019-1003029Jenkins Script Security Plugin Sandbox Bypass VulnerabilityAdded 2022-04-25
• CVE-2019-1003030Jenkins Matrix Project Plugin Remote Code Execution VulnerabilityAdded 2022-03-25

Keep going

• All exploited CVEs
• Check another CVE
• What is CISA KEV?
• What is EPSS?

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.