Security readout for executives and security teams
Plain-English summary
CVE-2019-20899 is a denial-of-service issue in Atlassian Jira’s Gadget API. An attacker could make affected Jira Server or Data Center instances unresponsive by sending repeated requests. The available sources do not provide CVSS scoring or detailed exploit conditions.
Executive priority
Treat this as an availability risk for business workflows that depend on Jira. Priority should rise if Jira is internet-facing or operationally critical, but available evidence is insufficient to rate it above unknown.
Technical view
The vulnerability affects Atlassian Jira Server and Data Center versions before 8.5.4, and 8.6.0 before 8.6.1. The issue is in the Gadget API and can cause Jira availability failure through repeated requests to a specific endpoint. Public source details are limited.
Likely exposure
Exposure is likely limited to organizations running affected Jira Server or Data Center versions, especially systems reachable by untrusted networks or internet users.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. It describes remote attack capability, but not authentication requirements, exploit maturity, or observed campaigns.
Researcher notes
The public description identifies the component, affected version ranges, and denial-of-service outcome, but lacks CVSS, CWE, authentication detail, endpoint detail, and exploit telemetry. Avoid assuming exploitability conditions beyond repeated remote requests.
Mitigation direction
- Inventory Jira Server and Data Center versions across all environments.
- Upgrade affected instances to 8.5.4, 8.6.1, or a later supported release.
- Review Atlassian JRASERVER-70808 for current vendor remediation guidance.
- Prioritize externally reachable Jira instances before internal-only systems.
Validation and detection
- Confirm no Jira instance is running below 8.5.4 or 8.6.0 before 8.6.1.
- Check whether Jira is reachable from untrusted networks or the public internet.
- Review availability logs for unexplained Jira unresponsiveness around repeated Gadget API traffic.
- Document remediation status for production, staging, and disaster recovery instances.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-20899 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://jira.atlassian.com/browse/JRASERVER-70808CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.