How severe is CVE-2019-13423?

CVE-2019-13423 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-13423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-13423?

CVE-2019-13423 affects Search-guard Search Guard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-13423?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-13423 published?

CVE-2019-13423 was published on 2019-08-23 and last updated on 2026-06-17.

CVE-2019-13423

CVE-2019-13423 is a high-severity vulnerability in Search-guard Search Guard with a CVSS 3.x base score of 8.8. 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-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Search-guard Search Guard
Published: 2019-08-23
Last modified: 2026-06-17

Description

Search Guard Kibana Plugin versions before 5.6.8-7 and before 6.x.y-12 had an issue that an authenticated Kibana user could impersonate as kibanaserver user when providing wrong credentials when all of the following conditions a-c are true: a) Kibana is configured to use Single-Sign-On as authentication method, one of Kerberos, JWT, Proxy, Client certificate. b) The kibanaserver user is configured to use HTTP Basic as the authentication method. c) Search Guard is configured to use an SSO authentication domain and HTTP Basic at the same time

Frequently asked questions

What is CVE-2019-13423?: Search Guard Kibana Plugin versions before 5.6.8-7 and before 6.x.y-12 had an issue that an authenticated Kibana user could impersonate as kibanaserver user when providing wrong credentials when all of the following conditions a-c are true: a) Kibana is configured to use Single-Sign-On as authentication method, one of Kerberos, JWT, Proxy, Client certificate. b) The kibanaserver user is configured to use HTTP Basic as the authentication method. c) Search Guard is configured to use an SSO authentication domain and HTTP Basic at the same time
How severe is CVE-2019-13423?: CVE-2019-13423 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-13423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-13423?: CVE-2019-13423 affects Search-guard Search Guard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-13423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-13423 published?: CVE-2019-13423 was published on 2019-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:search-guard:search_guard:*:*:*:*:*:kibana:*:*

More vulnerabilities in Search-guard Search Guard

CVE-2019-13419 — High (CVSS 7.5): Search Guard versions before 23.1 had an issue that for aggregations clear text values of anonymised fields were leaked.
CVE-2019-13418 — High (CVSS 7.5): Search Guard versions before 24.0 had an issue that values of string arrays in documents are not properly anonymized.
CVE-2019-13416 — Medium (CVSS 6.5): Search Guard versions before 24.3 had an issue when Cross Cluster Search (CCS) was enabled, authenticated users are…
CVE-2019-13415 — Medium (CVSS 6.5): Search Guard versions before 24.3 had an issue when Cross Cluster Search (CCS) was enabled, authenticated users can…
CVE-2019-13422 — Medium (CVSS 6.1): Search Guard Kibana Plugin versions before 5.6.8-7 and before 6.x.y-12 had an issue that an attacker can redirect the…
CVE-2018-20698 — Medium (CVSS 6.1): The floragunn Search Guard plugin before 6.x-16 for Kibana allows URL injection for login redirects on the login page…

All CVEs affecting Search-guard Search Guard →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →