How severe is CVE-2021-37936?

CVE-2021-37936 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-37936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37936?

CVE-2021-37936 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37936?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-37936 published?

CVE-2021-37936 was published on 2022-11-18 and last updated on 2026-06-17.

CVE-2021-37936

CVE-2021-37936 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Elastic Kibana
Published: 2022-11-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-37936?: 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.
How severe is CVE-2021-37936?: CVE-2021-37936 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-37936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37936?: CVE-2021-37936 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37936 published?: CVE-2021-37936 was published on 2022-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*

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