CVE-2021-44791
Reflected XSS on certain HTTP endpoints
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks.
- Record
CVE-2021-44791- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Reflected XSS on certain HTTP endpoints
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks.
- Record
CVE-2021-44791- Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2022-6296 No score
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks.
- Record
EUVD-2022-6296- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8rmv-98m4-g5c6
Apache Druid before 0.23.0 vulnerable to reflected XSS via unescaped URL parameters
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks. This issue is patched in version 0.23.0.
- Record
GHSA-8rmv-98m4-g5c6- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks.
- Record
CVE-2021-44791- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-8rmv-98m4-g5c6
Apache Druid before 0.23.0 vulnerable to reflected XSS via unescaped URL parameters
In Apache Druid 0.22.1 and earlier, certain specially-crafted links result in unescaped URL parameters being sent back in HTML responses. This makes it possible to execute reflected XSS attacks. This issue is patched in version 0.23.0.
- Record
GHSA-8rmv-98m4-g5c6- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.druid:druidMaven |
before 0.23.0 | 0.23.0 |
org.apache.druid:druidMaven |
before 0.23.0, plus listed versions 0.13.0-incubating0.14.0-incubating0.14.1-incubating0.14.2-incubating0.15.0-incubating Show 15 moreShow less0.15.1-incubating0.16.0-incubating0.16.1-incubating0.17.00.17.10.18.00.18.10.19.00.20.00.20.10.20.20.21.00.21.10.22.00.22.1 |
0.23.0 |
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-2021-44791 is a medium vulnerability (CVSS 6.1) in Apache Druid, published July 7, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.27%, the 83rd percentile. Fixed in org.apache.druid:druid 0.23.0.