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 Kiba

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HIGH 8.8UPGRADE

CVE-2019-13423 is a high-severity flaw (CVSS 8.8) affecting search guard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-287
Published	2019-08-23
Last modified	2026-06-17

Publisher (CNA): floragunn GmbH · Vendor: search-guard

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-08-23 14:15 UTCPublished CVE record published
2026-06-17 02:16 UTCUpdated Record last modified

search-guard search guard UPGRADE

Affected: < 5.6.8-7 · >= 6.1.0-8 and < 6.2.3-12

Fixed in: 5.6.8-7, 6.2.3-12

Safe to downgrade to: a release before 6.1.0-8

1. Check installed version

apt-cache policy search-guard || rpm -q search-guard || search-guard --version

2. UPGRADE to 5.6.8-7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade search-guard

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade search-guard

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.1.0-8 (Debian / Ubuntu)

apt-cache madison search-guard sudo apt install search-guard=<VERSION_BEFORE_6.1.0-8> sudo apt-mark hold search-guard

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list search-guard sudo dnf downgrade search-guard-<VERSION_BEFORE_6.1.0-8> sudo dnf versionlock add search-guard

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-13423?

search guard: upgrade to 5.6.8-7, 6.2.3-12. Exact commands for each OS are on this page.

Is CVE-2019-13423 being exploited?

CVE-2019-13423 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-13423 affect?

CVE-2019-13423 affects search guard. Severity is high (CVSS 8.8). 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:

How urgent is CVE-2019-13423?

Priority 44/100. High severity

Software pages

Kibana vulnerabilities

Related CVEs

CVE-2019-13422 MEDIUM 6.1 UPGRADE Search Guard Kibana Plugin versions before 5.6.8-7 and before 6.x.y-12 had an issue that an attacker can redir
CVE-2019-13421 MEDIUM 4.9 UPGRADE Search Guard versions before 23.1 had an issue that an administrative user is able to retrieve bcrypt password
CVE-2019-13420 MEDIUM 5.9 UPGRADE Search Guard versions before 21.0 had an timing side channel issue when using the internal user database.
CVE-2019-13419 HIGH 7.5 UPGRADE Search Guard versions before 23.1 had an issue that for aggregations clear text values of anonymised fields we
CVE-2019-13418 HIGH 7.5 UPGRADE Search Guard versions before 24.0 had an issue that values of string arrays in documents are not properly anon

References

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