THREATPORT/VULNERABILITY/CVE-2021-21669
CRITICAL SEVERITY

CVE-2021-21669

Generic Webhook Trigger vulnerability

CVSS
9.8
EPSS
25.7%
EPSS pct
98th
Exploited
No known
Jenkins Generic Webhook Trigger Plugin 1.72 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
Affected vendor
Jenkins
Affected product
Generic Webhook Trigger
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-06-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 25.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-21669

  • Confirm whether Jenkins Generic Webhook Trigger is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-21669.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-21669

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-21669 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2021-21669?

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