CVE-2021-44145
Apache NiFi information disclosure by XXE
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
CVE-2021-44145- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
Apache NiFi information disclosure by XXE
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
CVE-2021-44145- Updated
- 2026-11-02
EUVDEUVD-2022-0689 No score
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
EUVD-2022-0689- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rq96-qhc5-vm4r
Exposure of Sensitive Information to an Unauthorized Actor in Apache NiFi
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
GHSA-rq96-qhc5-vm4r- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSV
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
CVE-2021-44145- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-rq96-qhc5-vm4r
Exposure of Sensitive Information to an Unauthorized Actor in Apache NiFi
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
GHSA-rq96-qhc5-vm4r- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVBIT-nifi-2021-44145 No score
Apache NiFi information disclosure by XXE
In the TransformXML processor of Apache NiFi before 1.15.1 an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.
- Record
BIT-nifi-2021-44145- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.nifi:nifiMaven |
before 1.15.1 | 1.15.1 |
nifiBitnami |
0.1.0 up to 1.15.1 | 1.15.1 |
org.apache.nifi:nifiMaven |
before 1.15.1, plus listed versions 0.0.1-incubating0.0.2-incubating0.1.0-incubating0.2.0-incubating0.2.1 Show 42 moreShow less0.3.00.4.00.4.10.5.00.5.10.6.00.6.10.7.00.7.10.7.20.7.30.7.41.0.01.0.0-BETA1.0.11.1.01.1.11.1.21.10.01.11.01.11.11.11.21.11.31.11.41.12.01.12.11.13.01.13.11.13.21.14.01.15.01.2.01.3.01.4.01.5.01.6.01.7.01.7.11.8.01.9.01.9.11.9.2 |
1.15.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-44145 is a medium vulnerability (CVSS 6.5) in Apache Nifi, published December 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.76%, the 78th percentile. Fixed in org.apache.nifi:nifi 1.15.1.