CVE-2025-1520: PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability
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.
Classification
CVE ID: CVE-2025-1520
CVSS Base Severity: HIGH
CVSS Base Score: 7.1
CVSS Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types
CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')Affected Products
Vendor: PostHog
Product: PostHog
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.56% (probability of being exploited)
EPSS Percentile: 67.02% (scored less or equal to compared to others)
EPSS Date: 2025-05-22 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-1520https://www.zerodayinitiative.com/advisories/ZDI-25-099/
https://github.com/PostHog/posthog/commit/6e8f035f9acd339c5ba87ba6ea40fc1ab3053d42