What is the severity of CVE-2025-1520?

CVE-2025-1520 is rated as a critical severity vulnerability due to its potential for remote code execution.

How do I fix CVE-2025-1520?

To mitigate CVE-2025-1520, ensure you update PostHog to the latest version where the vulnerability has been patched.

Who is affected by CVE-2025-1520?

CVE-2025-1520 affects installations of PostHog that have not been updated to the patched versions.

What type of attack does CVE-2025-1520 enable?

CVE-2025-1520 enables network-adjacent attackers to execute arbitrary code on the affected PostHog installations.

Is authentication required to exploit CVE-2025-1520?

Yes, authentication is required to exploit CVE-2025-1520.

Vulnerability/
CVE-2025-1520

high

7.1

CWE

23/4/2025

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

First published: Wed Apr 23 2025(Updated: )

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.

Credit: zdi-disclosures@trendmicro.com

Affected Software	Affected Version	How to fix
npm/@posthog/plugin-server	<=1.10.7

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2025-1520?
CVE-2025-1520 is rated as a critical severity vulnerability due to its potential for remote code execution.
How do I fix CVE-2025-1520?
To mitigate CVE-2025-1520, ensure you update PostHog to the latest version where the vulnerability has been patched.
Who is affected by CVE-2025-1520?
CVE-2025-1520 affects installations of PostHog that have not been updated to the patched versions.
What type of attack does CVE-2025-1520 enable?
CVE-2025-1520 enables network-adjacent attackers to execute arbitrary code on the affected PostHog installations.
Is authentication required to exploit CVE-2025-1520?
Yes, authentication is required to exploit CVE-2025-1520.

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alias/ZDI-25-099
alias/ZDI-CAN-25350
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package-manager/npm
vendor/posthog

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