CVE-2025-1520 PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability
Authenticated attackers can execute arbitrary code via SQL injection in PostHog's ClickHouse table functions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-1520?
CVE-2025-1520 is a high-severity SQL injection vulnerability in PostHog, published on 23 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-89
Which versions are affected by CVE-2025-1520?
2 open source packages ship an affected version, including @posthog/plugin-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@posthog/plugin-server npm | All versions to 1.10.7 | None |
@posthog/plugin-server npm | All versions to 1.10.7 | None |
Products include Posthog Posthog.
How do I fix CVE-2025-1520?
No fix has been published for CVE-2025-1520 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2025-1520 being exploited?
There is no known exploitation of CVE-2025-1520 in the wild and no public exploit code.
Other vulnerabilities in PostHog
- CVE-2025-1521 PostHog slack_incoming_webhook Server-Side Request Forgery Information Disclosure Vulnerability
- CVE-2025-1522 PostHog database_schema Server-Side Request Forgery Information Disclosure Vulnerability
- CVE-2024-9710 PostHog database_schema Server-Side Request Forgery Information Disclosure Vulnerability
- CVE-2022-0645 Open redirect vulnerability via endpoint authorize_and_redirect/?redirect= in posthog/posthog
- CVE-2023-46746 Authenticated PostHog users vulnerable to SSRF
Sources
Also known as GHSA-v64v-fq96-c5wv.