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Vulnerabilities

Vulnerability · CVE-2021-21689

FilePath#unzip and FilePath#untar were not subject to any agent-to-controller access control in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Published Nov 4, 2021 · catalog updated Jun 17, 2026 · FilePath#unzip and FilePath#untar were

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-21689. EPSS is 1.50%. Act only if a listed version of FilePath#unzip and FilePath#untar were is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (FilePath#unzip and FilePath#untar were).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.50%
Remediation
Version ranges on file
Affected products
cpe jenkins/jenkins

FilePath#unzip and FilePath#untar were not subject to any agent-to-controller access control in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe jenkins/jenkins< 2.303.3
  • cpe jenkins/jenkins< 2.319

How to fix CVE-2021-21689

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-21689. EPSS is 1.50%. Act only if a listed version of FilePath#unzip and FilePath#untar were is installed.

Which versions are affected?

Compare what you have installed with < 2.303.3, < 2.319. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.50%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Jenkins security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2021 · Monitored products — critical

    Detected

    FilePath#unzip and FilePath#untar were not subject to any agent-to-controller access control in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

  2. Jun 17, 2026 · Monitored products — critical

    Updated

    FilePath#unzip and FilePath#untar were not subject to any agent-to-controller access control in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Sources

  • CVE.orgVulnerability recordCVE-2021-21689

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2021-21689

    FilePath#unzip and FilePath#untar were not subject to any agent-to-controller access control in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 3, 2026