# CVE-2025-1520: PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability

> CVE-2025-1520: PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability. CVSS 7.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-1520
Last updated: 2026-06-17T08:39:17Z

- Published: 2025-04-23 16:45 UTC · Updated: 2026-06-17 08:39 UTC · Assigner: zdi
- CVSS: 7.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.47%, 40th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-89

## Description

PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of PostHog. Authentication is required to exploit this vulnerability. The specific flaw exists within the implementation of the SQL parser. The issue results from the lack of proper validation of a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to execute code in the context of the database account. Was ZDI-CAN-25350.

## Affected vendors and products

- PostHog: PostHog

## Tracked companies

- [PostHog](https://rewindex.com/company/posthog.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-1520)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-1520)
- [https://github.com/PostHog/posthog/commit/6e8f035f9acd339c5ba87ba6ea40fc1ab3053d42](https://github.com/PostHog/posthog/commit/6e8f035f9acd339c5ba87ba6ea40fc1ab3053d42)
- [https://www.zerodayinitiative.com/advisories/ZDI-25-099/](https://www.zerodayinitiative.com/advisories/ZDI-25-099/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-1520 · Markdown: https://rewindex.com/cve/CVE-2025-1520.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-1520 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:31.738Z