CVE-2025-1520: PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability

Q: How do I fix CVE-2025-1520?

posthog: upgrade to 0.3.7. Exact commands for each OS are on this page.

Q: Is CVE-2025-1520 being exploited?

CVE-2025-1520 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-1520 affect?

CVE-2025-1520 affects posthog. Severity is high (CVSS 8.0). 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

Routine

HIGH 8.0UPGRADE

CVE-2025-1520 is a high-severity flaw (CVSS 8.0) affecting posthog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 querie

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-89
Published	2025-04-23
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: posthog

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-23 17:16 UTCPublished CVE record published
2026-06-17 08:39 UTCUpdated Record last modified

posthog posthog UPGRADE

Affected: < 0.3.7

Fixed in: 0.3.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy posthog || rpm -q posthog || posthog --version

2. UPGRADE to 0.3.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade posthog

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade posthog

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-1520?

posthog: upgrade to 0.3.7. Exact commands for each OS are on this page.

Is CVE-2025-1520 being exploited?

CVE-2025-1520 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-1520 affect?

CVE-2025-1520 affects posthog. Severity is high (CVSS 8.0). 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

How urgent is CVE-2025-1520?

Priority 38/100. High severity

Software pages

ClickHouse vulnerabilities

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References

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