How severe is CVE-2023-51387?

CVE-2023-51387 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-51387 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51387?

CVE-2023-51387 affects Apache Hertzbeat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-51387?

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-2023-51387 published?

CVE-2023-51387 was published on 2023-12-22 and last updated on 2026-06-17.

CVE-2023-51387

CVE-2023-51387 is a high-severity vulnerability in Apache Hertzbeat with a CVSS 3.x base score of 7.2. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Apache Hertzbeat
Published: 2023-12-22
Last modified: 2026-06-17

Description

Hertzbeat is an open source, real-time monitoring system. Hertzbeat uses aviatorscript to evaluate alert expressions. The alert expressions are supposed to be some simple expressions. However, due to improper sanitization for alert expressions in version prior to 1.4.1, a malicious user can use a crafted alert expression to execute any command on hertzbeat server. A malicious user who has access to alert define function can execute any command in hertzbeat instance. This issue is fixed in version 1.4.1.

Frequently asked questions

What is CVE-2023-51387?: Hertzbeat is an open source, real-time monitoring system. Hertzbeat uses aviatorscript to evaluate alert expressions. The alert expressions are supposed to be some simple expressions. However, due to improper sanitization for alert expressions in version prior to 1.4.1, a malicious user can use a crafted alert expression to execute any command on hertzbeat server. A malicious user who has access to alert define function can execute any command in hertzbeat instance. This issue is fixed in version 1.4.1.
How severe is CVE-2023-51387?: CVE-2023-51387 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-51387 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51387?: CVE-2023-51387 affects Apache Hertzbeat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-51387?: 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-2023-51387 published?: CVE-2023-51387 was published on 2023-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:hertzbeat:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Hertzbeat

CVE-2023-51653 — Critical (CVSS 9.8): Hertzbeat is a real-time monitoring system. In the implementation of `JmxCollectImpl.java`,…
CVE-2023-51389 — Critical (CVSS 9.8): Hertzbeat is a real-time monitoring system. At the interface of `/define/yml`, SnakeYAML is used as a parser to parse…
CVE-2023-51388 — Critical (CVSS 9.8): Hertzbeat is a real-time monitoring system. In `CalculateAlarm.java`, `AviatorEvaluator` is used to directly execute…
CVE-2026-24343 — High (CVSS 8.8): Improper Neutralization of Data within XPath Expressions ('XPath Injection') vulnerability in Apache HertzBeat. This…
CVE-2025-48208 — High (CVSS 8.8): Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') vulnerability in Apache HertzBeat…
CVE-2025-24404 — High (CVSS 8.8): XML Injection RCE by parse http sitemap xml response vulnerability in Apache HertzBeat. The attacker needs…

All CVEs affecting Apache Hertzbeat →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-76605 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Remote code execution via image element in Fabrik < 4.7.3 - ???.
CVE-2026-76604 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Unauthenticated remote code execution via PHP form element in Fabrik < 4.7.3 - The…
CVE-2026-67364 — Critical (CVSS 10.0): Joomla Extension - balbooa.com - Pre-auth PHP Code Injection in Balbooa Forms < 2.4.3.2 - CWE-94 / CWE-95 | CVSS 3.1:…
CVE-2026-73343 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in WP Compress < 7.20.01 versions.
CVE-2026-74253 — Critical (CVSS 10.0): Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0…
CVE-2026-73678 — Critical (CVSS 10.0): MindsDB Minds Platform version 26.1.0 and earlier contains an unauthenticated remote code execution vulnerability that…

Browse all CWE-94 (Code Injection) vulnerabilities →