CVE-2025-1520

Authenticated code execution via unsanitized SQL strings

Published Apr 23, 2025 · Updated Apr 23, 2025

SQL injection in PostHog's ClickHouse table-function parser allows remote authenticated users to execute code as the database account. The parser incorporates a user-supplied string into a ClickHouse query without validating SQL metacharacters, allowing the input to alter the generated statement. Exploitation requires authenticated access from an adjacent network and can read, modify, or interrupt data available to the database account.

CVSS severity7.1
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in PostHog's ClickHouse table-function parser allows remote authenticated users to execute code as the database account. The parser incorporates a user-supplied string into a ClickHouse query without validating SQL metacharacters, allowing the input to alter the generated statement. Exploitation requires authenticated access from an adjacent network and can read, modify, or interrupt data available to the database account.

The record

CVE
CVE-2025-1520
Published
Apr 23, 2025
Updated
Apr 23, 2025
Vendor
PostHog
Product
PostHog
Classifications
CWE-89, T1190
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=b8817c14065c23159dcf52849f0bdcd12516c43e, clickhouse 23.12.6.19-alpine

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

PostHog · PostHogversion=b8817c14065c23159dcf52849f0bdcd12516c43e, clickhouse 23.12.6.19-alpine

Published CVSS scores

7.1Zero Day InitiativeCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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