Medium severity · published Nov 18, 2022
CVE-2021-37936
It was discovered that Kibana was not sanitizing document fields containing HTML snippets
5.4
CVSS
0.5%
EPSS
No
On KEV
Description
It was discovered that Kibana was not sanitizing document fields containing HTML snippets. Using this vulnerability, an attacker with the ability to write documents to an elasticsearch index could inject HTML. When the Discover app highlighted a search term containing the HTML, it would be rendered for the user.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
Kibana · Elastic
before 7.14.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-37936
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-37936
Mitigation
https://discuss.elastic.co/t/elastic-stack-7-14-1-security-update/283077
Mitigation
https://www.elastic.co/community/security/
More from Kibana
10.0
CVE-2019-7609
Kibana Arbitrary Code Execution
9.9
CVE-2025-25015
Kibana arbitrary code execution via prototype pollution
9.8
CVE-2025-25014
Kibana arbitrary code execution via prototype pollution
9.8
CVE-2024-12556
Kibana Prototype Pollution can lead to code injection
9.8
CVE-2018-17246
Kibana versions before 6.4.3 and 5.6.13 contain an arbitrary file inclusion flaw in the Console plugin