CVE-2024-9710 Overview
CVE-2024-9710 is a Server-Side Request Forgery (SSRF) vulnerability in PostHog, an open-source product analytics platform. The flaw resides in the database_schema method, which fails to properly validate a URI before accessing resources. Authenticated remote attackers can abuse this weakness to issue server-initiated requests to internal or unintended endpoints. According to the Zero Day Initiative advisory ZDI-24-1383, an attacker can leverage this vulnerability to execute code in the context of the service account, resulting in information disclosure and potential lateral movement. The issue is tracked as CWE-918: Server-Side Request Forgery.
Critical Impact
Authenticated attackers can force the PostHog server to access arbitrary URIs, disclose sensitive internal resources, and potentially execute code as the service account.
Affected Products
- PostHog (self-hosted deployments prior to the fix in PR #25388)
- PostHog database_schema method implementations
- Deployments exposing PostHog to authenticated users with data source configuration privileges
Discovery Timeline
- 2024-11-22 - CVE-2024-9710 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-9710
Vulnerability Analysis
The vulnerability affects PostHog's database_schema functionality, which is intended to introspect external data sources connected to the analytics platform. The endpoint accepts user-supplied URI input and issues server-side requests without enforcing sufficient validation on the URI scheme, host, or destination. Because the request originates from the PostHog service, it inherits the network position and identity of the backend host. An attacker with a valid authenticated session can direct the server to internal metadata services, private-network hosts, or attacker-controlled endpoints. The ZDI advisory notes that exploitation can escalate beyond information disclosure into code execution within the context of the PostHog service account.
Root Cause
The root cause is missing URI validation prior to resource access inside the database_schema method. The implementation does not restrict schemes, resolve and filter internal address ranges, or enforce an allowlist of legitimate database endpoints. This gap allows any authenticated caller to substitute arbitrary destinations for what is intended to be a controlled database schema fetch.
Attack Vector
Exploitation requires network reachability to the PostHog application and a valid authenticated account with permission to configure or query data sources. The attacker submits a crafted URI to the vulnerable endpoint, coercing the server into making outbound or internal requests on their behalf. Typical SSRF impact includes reading cloud instance metadata, probing internal services, and retrieving credentials that further the intrusion. The ZDI-24-1383 advisory documents the flaw as originally reported under ZDI-CAN-25351.
No public proof-of-concept exploit code is available. Technical remediation details are captured in the vendor fix at PostHog Pull Request 25388.
Detection Methods for CVE-2024-9710
Indicators of Compromise
- Outbound HTTP or database-protocol requests from the PostHog application host to unexpected destinations, including RFC1918 ranges, 169.254.169.254, or localhost.
- Application logs showing calls to the database_schema endpoint containing non-database URIs or unusual schemes such as file://, gopher://, or http://.
- Unexpected access attempts against internal services originating from the PostHog service account.
Detection Strategies
- Inspect PostHog application logs for database_schema invocations correlated with anomalous URI patterns and non-standard ports.
- Monitor egress traffic from PostHog hosts and alert on connections to cloud metadata endpoints or internal management interfaces.
- Correlate authenticated user sessions with data source configuration changes to identify low-privilege accounts probing the endpoint.
Monitoring Recommendations
- Forward PostHog application and web-tier logs into a centralized analytics platform such as Singularity Data Lake for retention and query.
- Deploy egress firewall rules that deny PostHog hosts from reaching internal management ranges and cloud metadata services by default.
- Baseline normal database_schema request volume per user and alert on deviations that indicate enumeration.
How to Mitigate CVE-2024-9710
Immediate Actions Required
- Upgrade PostHog to a release that incorporates the fix from PostHog Pull Request 25388.
- Audit accounts with data source configuration privileges and revoke access that is not operationally required.
- Rotate any credentials, tokens, or cloud instance metadata secrets that the PostHog service account could have accessed.
Patch Information
PostHog addressed the SSRF in the database_schema implementation through Pull Request 25388. Self-hosted operators must apply the corresponding upstream release. PostHog Cloud users receive the fix through the managed service. Review the ZDI-24-1383 advisory for the original vulnerability report.
Workarounds
- Restrict PostHog network egress with host-based or network firewall rules that block access to internal address ranges and cloud metadata endpoints.
- Place PostHog behind an authenticated proxy that enforces strict URI allowlists for outbound data source connections.
- Limit the roles that can configure external data sources until the patched version is deployed.
# Example egress restriction for a PostHog host (iptables)
iptables -A OUTPUT -d 169.254.169.254 -j DROP
iptables -A OUTPUT -d 10.0.0.0/8 -p tcp --dport 80 -j DROP
iptables -A OUTPUT -d 10.0.0.0/8 -p tcp --dport 443 -j DROP
iptables -A OUTPUT -d 172.16.0.0/12 -p tcp --dport 80 -j DROP
iptables -A OUTPUT -d 192.168.0.0/16 -p tcp --dport 80 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
