CVE-2025-1520

PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability

7.1 High

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.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.47%Up 0.2 points since Apr 24, 2025

What each source reports

CVE List Score used 7.1

PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability

Record: CVE-2025-1520
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-89
Updated: 2026-11-02

EUVDEUVD-2025-12167 7.1

Record: EUVD-2025-12167
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-v64v-fq96-c5wv 7.1

PostHog Plugin Server SQL Injection Vulnerability

Record: GHSA-v64v-fq96-c5wv
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-89
Updated: 2026-11-02

NVD 8.0

Record: CVE-2025-1520
CVSS 3.1: 8.0 HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-89
Updated: 2026-11-02

OSV 7.1

PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability

Record: CVE-2025-1520
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-89
Updated: 2026-11-02

OSVGHSA-v64v-fq96-c5wv 7.1

PostHog Plugin Server SQL Injection Vulnerability

Record: GHSA-v64v-fq96-c5wv
CVSS 3.0: 7.1 HighCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-89
Updated: 2026-11-02

Affected products

posthog

Affected packages

Affected packages
Package	Affected	Fixed
`@posthog/plugin-server` npm	through 1.10.7	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-1520 is a high vulnerability (CVSS 7.1) in Posthog, published April 23, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 40th percentile. No source names a fixed version.