Security readout for executives and security teams
Plain-English summary
This is a cross-site scripting issue in Atlassian Jira Server and Jira Data Center. In affected versions, a remote attacker could inject arbitrary HTML or JavaScript through the CardLayoutConfigTable component. That can affect user trust and may expose sessions or actions performed in a victim user's browser.
Executive priority
Treat this as a near-term web application security update, especially for externally reachable Jira. The bundle does not support emergency active-exploitation language, but XSS in Jira can still create meaningful user and workflow risk.
Technical view
CVE-2021-26079 affects Jira Server and Jira Data Center before 8.5.15, 8.6.0 through before 8.13.7, and 8.14.0 through before 8.17.0. The flaw is XSS in CardLayoutConfigTable, allowing remote HTML or JavaScript injection. No CVSS, CWE, or exploitation details are provided in the bundle.
Likely exposure
Exposure is likely limited to organizations running affected Jira Server or Jira Data Center versions. Internet-facing Jira instances carry higher business risk because untrusted users or external attackers may reach the vulnerable surface, depending on configuration and access controls.
Exploitation context
The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. It only supports that remote attackers could inject HTML or JavaScript through the vulnerable Jira component.
Researcher notes
Evidence is sparse: the bundle names the vulnerable component, affected version ranges, and XSS impact, but provides no CVSS vector, CWE, authentication requirement, exploit status, or detailed trigger conditions. Avoid assuming exploitability beyond remote HTML or JavaScript injection.
Mitigation direction
- Upgrade Jira Server/Data Center to a fixed version: 8.5.15, 8.13.7, 8.17.0, or later as applicable.
- Review Atlassian JRASERVER-72396 for vendor-specific remediation details.
- Restrict external access to Jira while remediation is pending.
- Prioritize remediation for internet-facing or broadly accessible Jira instances.
Validation and detection
- Inventory all Jira Server and Jira Data Center deployments and record exact versions.
- Compare versions against affected ranges in the CVE record.
- Confirm upgraded instances report 8.5.15, 8.13.7, 8.17.0, or later fixed branches.
- Review Jira audit records for unexpected card layout configuration changes.
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-2021-26079 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-72396CVE 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.