{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-1521 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-1521 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-1521 is a high-severity server-side request forgery vulnerability in PostHog, published on 23 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-1521 and fix it if it is affected.\n\nWhat it is: CVE-2025-1521 is a high-severity server-side request forgery vulnerability in PostHog, published on 23 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-1521 in the wild and no public exploit code.\n\nAffected product: PostHog. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-1521/ (Markdown: https://insights.sbomify.com/CVE-2025-1521/index.md)","id":"CVE-2025-1521","markdown":"https://insights.sbomify.com/CVE-2025-1521/index.md","name":"CVE-2025-1521","record":{"aliases":["GHSA-8w5j-q5mj-5jpv"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"PostHog analytics platform","requires_auth":"low_privilege","summary":"Authenticated attackers can exploit SSRF in PostHog's Slack webhook to disclose sensitive information and potentially execute code.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zdi","cpe":[{"product":"posthog","vendor":"posthog"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","version":"3.0"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"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.\n\nThe 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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"PostHog slack_incoming_webhook Server-Side Request Forgery Information Disclosure Vulnerability","id":"CVE-2025-1521","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"ssrf","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"PostHog database_schema Server-Side Request Forgery Information Disclosure Vulnerability","id":"CVE-2025-1522"},"packages":[],"prev":{"headline":"PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability","id":"CVE-2025-1520"},"products":["PostHog"],"published":"2025-04-23","related":[{"cvss_score":7.1,"headline":"PostHog ClickHouse Table Functions SQL Injection Remote Code Execution Vulnerability","id":"CVE-2025-1520","kev_date_added":null,"published":"2025-04-23"},{"cvss_score":7.1,"headline":"PostHog database_schema Server-Side Request Forgery Information Disclosure Vulnerability","id":"CVE-2025-1522","kev_date_added":null,"published":"2025-04-23"},{"cvss_score":7.1,"headline":"PostHog database_schema Server-Side Request Forgery Information Disclosure Vulnerability","id":"CVE-2024-9710","kev_date_added":null,"published":"2024-11-22"},{"cvss_score":6.1,"headline":"Open redirect vulnerability via endpoint authorize_and_redirect/?redirect= in posthog/posthog","id":"CVE-2022-0645","kev_date_added":null,"published":"2022-04-19"},{"cvss_score":4.8,"headline":"Authenticated PostHog users vulnerable to SSRF","id":"CVE-2023-46746","kev_date_added":null,"published":"2023-12-01"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-23","vendors":["PostHog"]},"summary":"Authenticated attackers can exploit SSRF in PostHog's Slack webhook to disclose sensitive information and potentially execute code.","url":"https://insights.sbomify.com/CVE-2025-1521/"}