Security readout for executives and security teams
Plain-English summary
Affected Atlassian Jira Server and Data Center versions can be disrupted through the avatar upload feature using a crafted PNG file. The known impact is denial of service, meaning Jira availability could be affected. The source bundle does not show data theft, code execution, or confirmed active exploitation.
Executive priority
Treat this as an availability risk for Jira rather than a confirmed breach vector. Patch vulnerable, exposed, or critical Jira systems promptly, especially where Jira supports incident response, engineering, or customer operations.
Technical view
CVE-2019-20897 is a remote denial-of-service issue in Jira's avatar upload handling for crafted PNG files. Affected versions are before 8.5.4, 8.6.0 before 8.6.2, and 8.7.0 before 8.7.1. No CVSS, CWE, exploit status, or detailed root cause is provided in the bundle.
Likely exposure
Organizations running Jira Server or Data Center in the listed vulnerable version ranges may be exposed if avatar upload functionality is reachable to users or remote attackers.
Exploitation context
The bundle does not list this CVE in KEV and does not cite active exploitation. Available evidence supports remote denial of service via crafted PNG upload only; it does not support claims of ransomware use, privilege escalation, or remote code execution.
Researcher notes
Evidence is sparse: no CVSS vector, CWE, exploit reference, or root-cause detail is included. Analysis should stay bounded to affected Jira versions, avatar upload, crafted PNG handling, and denial of service unless Atlassian's issue page provides more detail.
Mitigation direction
- Upgrade affected Jira instances to 8.5.4, 8.6.2, 8.7.1, or later supported versions.
- Review Atlassian advisory JRASERVER-70813 for current vendor guidance.
- Restrict access to Jira avatar upload paths where operationally feasible.
- Prioritize externally reachable or business-critical Jira deployments first.
Validation and detection
- Inventory Jira Server and Data Center versions across all environments.
- Confirm whether instances fall before 8.5.4, 8.6.2, or 8.7.1 thresholds.
- Check whether avatar upload functionality is enabled and reachable.
- Review service availability logs for unexplained Jira crashes or resource exhaustion.
- Document patch status and compensating controls for each Jira deployment.
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
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CVE-2019-20897 mapping review
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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-70813CVE 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.