How severe is CVE-2023-25826?

CVE-2023-25826 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-25826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-25826?

CVE-2023-25826 affects Opentsdb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-25826?

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

When was CVE-2023-25826 published?

CVE-2023-25826 was published on 2023-05-03 and last updated on 2026-06-17.

CVE-2023-25826

CVE-2023-25826 is a critical-severity vulnerability in Opentsdb with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 36% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 36% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Opentsdb
Published: 2023-05-03
Last modified: 2026-06-17

Description

Due to insufficient validation of parameters passed to the legacy HTTP query API, it is possible to inject crafted OS commands into multiple parameters and execute malicious code on the OpenTSDB host system. This exploit exists due to an incomplete fix that was made when this vulnerability was previously disclosed as CVE-2020-35476. Regex validation that was implemented to restrict allowed input to the query API does not work as intended, allowing crafted commands to bypass validation.

Frequently asked questions

What is CVE-2023-25826?: Due to insufficient validation of parameters passed to the legacy HTTP query API, it is possible to inject crafted OS commands into multiple parameters and execute malicious code on the OpenTSDB host system. This exploit exists due to an incomplete fix that was made when this vulnerability was previously disclosed as CVE-2020-35476. Regex validation that was implemented to restrict allowed input to the query API does not work as intended, allowing crafted commands to bypass validation.
How severe is CVE-2023-25826?: CVE-2023-25826 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-25826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-25826?: CVE-2023-25826 affects Opentsdb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-25826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-25826 published?: CVE-2023-25826 was published on 2023-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opentsdb:opentsdb:*:*:*:*:*:*:*:*

More vulnerabilities in Opentsdb

CVE-2023-36812 — Critical (CVSS 9.8): OpenTSDB is a open source, distributed, scalable Time Series Database (TSDB). OpenTSDB is vulnerable to Remote Code…
CVE-2020-35476 — Critical (CVSS 9.8): A remote code execution vulnerability occurs in OpenTSDB through 2.4.0 via command injection in the yrange parameter.…
CVE-2018-12972 — Critical (CVSS 9.8): An issue was discovered in OpenTSDB 2.3.0. Many parameters to the /q URI can execute commands, including o, key, style,…
CVE-2023-25827 — High (CVSS 8.2): Due to insufficient validation of parameters reflected in error messages by the legacy HTTP query API and the logging…
CVE-2018-13003 — Medium (CVSS 6.1): An issue was discovered in OpenTSDB 2.3.0. There is XSS in parameter 'type' to the /suggest URI.
CVE-2018-12973 — Medium (CVSS 6.1): An issue was discovered in OpenTSDB 2.3.0. There is XSS in parameter 'json' to the /q URI.

All CVEs affecting Opentsdb →

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