🛡️ CVE-2025-1521
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-918 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

PostHog slack_incoming_webhook Server-Side Request Forgery Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of PostHog. Authentication is required to exploit this vulnerability. The specific flaw exists within the processing of the slack_incoming_webhook parameter. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-25352.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-918
Public Exploit ✅ No
Source NVD
Published 2025-04-23
Updated 2026-06-02
Modified 2025-08-07

Affected Packages

Software From version Fixed in
posthog 0.3.7

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