{"answers":{"affected":"2 open source packages ship an affected version, including getgrav/grav. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34253 exists.","fix":"Upgrade getgrav/grav to 1.7.42 or later.","what":"CVE-2023-34253 is a high-severity code injection vulnerability in Getgrav Grav, published on 14 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-34253 and fix it if it is affected.\n\nWhat it is: CVE-2023-34253 is a high-severity code injection vulnerability in Getgrav Grav, published on 14 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34253 exists.\n\nAffected packages and fixed versions:\n- getgrav/grav (Packagist): affected all versions; fixed in 1.7.42\n- getgrav/grav (Packagist): affected all versions; fixed in 1.7.42\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-2023-34253/ (Markdown: https://insights.sbomify.com/CVE-2023-34253/index.md)","id":"CVE-2023-34253","markdown":"https://insights.sbomify.com/CVE-2023-34253/index.md","name":"CVE-2023-34253","record":{"aliases":["GHSA-j3v8-v77f-fvgm"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Grav CMS","requires_auth":"low_privilege","summary":"A low-privileged attacker with admin panel access can achieve remote code execution by bypassing the template injection denylist in Grav CMS.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"grav","vendor":"getgrav"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-184","name":"Incomplete List of Disallowed Inputs"},{"id":"CWE-1336","name":"Improper Neutralization of Special Elements Used in a Template Engine"}],"description":"Grav is a flat-file content management system. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- (1) using unsafe functions that are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. A patch in version 1.7.42 improves the denylist.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Grav vulnerable to Server-side Template Injection (SSTI) via Denylist Bypass","id":"CVE-2023-34253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"getgrav:grav","products":["getgrav:grav"],"type":"code_injection","year":"2023"},"n_packages":2,"n_references":5,"next":{"headline":"Remote inventory task command injection when using ssh command mode","id":"CVE-2023-34254"},"packages":[{"ecosystem":"Packagist","fixed":["1.7.42"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":null,"source":"GHSA-j3v8-v77f-fvgm"},{"ecosystem":"Packagist","fixed":["1.7.42"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":"pkg:composer/getgrav/grav","source":"GHSA-j3v8-v77f-fvgm"}],"prev":{"headline":"Grav Server-side Template Injection via Insufficient Validation in filterFilter","id":"CVE-2023-34252"},"products":["grav"],"published":"2023-06-14","related":[{"cvss_score":10,"headline":"Grav Server Side Template Injection vulnerability","id":"CVE-2023-34251","kev_date_added":null,"published":"2023-06-14"},{"cvss_score":9.8,"headline":"Cross-site scripting in n/a","id":"CVE-2025-46199","kev_date_added":null,"published":"2025-07-25"},{"cvss_score":9.3,"headline":"GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)","id":"CVE-2021-47812","kev_date_added":null,"published":"2026-01-15"},{"cvss_score":9.1,"headline":"Grav may be vulnerable to SSRF attack via Twig Templates","id":"CVE-2025-66844","kev_date_added":null,"published":"2025-12-15"},{"cvss_score":9.1,"headline":"Code Injection in getgrav/grav","id":"CVE-2022-2073","kev_date_added":null,"published":"2022-06-29"},{"cvss_score":8.9,"headline":"Grav: Stored XSS via Tag Injection","id":"CVE-2026-42611","kev_date_added":null,"published":"2026-05-11"},{"cvss_score":8.8,"headline":"Grav: Unauthenticated Path Traversal \u0026 Arbitrary File Write in FormFlash component.","id":"CVE-2026-42608","kev_date_added":null,"published":"2026-05-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-12-18","vendors":["getgrav"]},"summary":"A low-privileged attacker with admin panel access can achieve remote code execution by bypassing the template injection denylist in Grav CMS.","url":"https://insights.sbomify.com/CVE-2023-34253/"}