Security readout for executives and security teams
Plain-English summary
CVE-2018-1309 affects Apache NiFi systems that process XML with the SplitXML processor. Malicious XML could expose information or possibly enable remote code execution. Apache fixed this in NiFi 1.6.0 by disabling external general entity parsing and disallowing doctype declarations.
Executive priority
Prioritize remediation where NiFi processes external XML, because the vendor-described impact includes data exposure and possible remote code execution. Lower urgency may be reasonable only for retired, isolated, or non-XML-processing NiFi deployments.
Technical view
The issue is an XXE-style flaw in Apache NiFi SplitXML affecting versions 0.1.0 through 1.5.0. The vulnerable parsing behavior allowed external general entities and doctype declarations before the 1.6.0 fix, creating potential information disclosure or remote code execution risk when malicious XML is processed.
Likely exposure
Exposure is likely limited to Apache NiFi 0.1.0 through 1.5.0 installations that use SplitXML on XML content, especially content from users, partners, queues, APIs, or other untrusted sources.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. Risk depends on whether an affected NiFi instance processes attacker-controlled XML through SplitXML. The public advisory states possible information disclosure or remote code execution.
Researcher notes
Evidence is strong for affected product, version range, impact class, and fixed release. Evidence is incomplete for CVSS, CWE mapping, exploit maturity, and operational indicators. Do not assume active exploitation from the provided bundle.
Mitigation direction
- Upgrade affected Apache NiFi 1.x deployments to 1.6.0 or an appropriate later release.
- Identify flows using SplitXML and prioritize those processing external or untrusted XML.
- If upgrade is delayed, reduce or pause untrusted XML processing through affected flows.
- Review Apache NiFi security guidance for any environment-specific recommendations.
Validation and detection
- Inventory Apache NiFi versions and flag any release from 0.1.0 through 1.5.0.
- Review NiFi flow definitions for SplitXML processor usage.
- Confirm upgraded instances are running NiFi 1.6.0 or later.
- Map XML input sources to determine whether untrusted content reaches SplitXML.
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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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-1309 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://nifi.apache.org/security.html#CVE-2018-1309CVE reference · x_refsource_CONFIRM
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.