{"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-2025-66303 exists.","fix":"Upgrade getgrav/grav to 1.8.0-beta.27 or later.","what":"CVE-2025-66303 is a medium-severity denial of service vulnerability in Getgrav Grav, published on 1 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-66303 and fix it if it is affected.\n\nWhat it is: CVE-2025-66303 is a medium-severity denial of service vulnerability in Getgrav Grav, published on 1 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66303 exists.\n\nAffected packages and fixed versions:\n- getgrav/grav (Packagist): affected all versions; fixed in 1.8.0-beta.27\n- getgrav/grav (Packagist): affected all versions; fixed in 1.8.0-beta.27\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-2025-66303/ (Markdown: https://insights.sbomify.com/CVE-2025-66303/index.md)","id":"CVE-2025-66303","markdown":"https://insights.sbomify.com/CVE-2025-66303/index.md","name":"CVE-2025-66303","record":{"aliases":["GHSA-x62q-p736-3997"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Grav CMS","requires_auth":"high_privilege","summary":"Attackers can crash the Grav admin panel by injecting malicious cron expressions into the scheduled_at parameter, requiring manual server intervention to recover.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"grav","vendor":"getgrav"}],"cvss":{"score":4.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Grav is a file-based Web platform. Prior to 1.8.0-beta.27, A Denial of Service (DoS) vulnerability has been identified in Grav related to the handling of scheduled_at parameters. Specifically, the application fails to properly sanitize input for cron expressions. By manipulating the scheduled_at parameter with a malicious input, such as a single quote, the application admin panel becomes non-functional, causing significant disruptions to administrative operations. The only way to recover from this issue is to manually access the host server and modify the backup.yaml file to correct the corrupted cron expression. This vulnerability is fixed in 1.8.0-beta.27.","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 is vulnerable to a DOS on the admin panel","id":"CVE-2025-66303","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"getgrav:grav","products":["getgrav:grav"],"type":"denial_of_service","year":"2025"},"n_packages":2,"n_references":2,"next":{"headline":"Grav Exposes Password Hashes Leading to privilege escalation","id":"CVE-2025-66304"},"packages":[{"ecosystem":"Packagist","fixed":["1.8.0-beta.27"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":null,"source":"GHSA-x62q-p736-3997"},{"ecosystem":"Packagist","fixed":["1.8.0-beta.27"],"introduced":["0"],"last_affected":[],"package":"getgrav/grav","purl":"pkg:composer/getgrav/grav","source":"GHSA-x62q-p736-3997"}],"prev":{"headline":"Grav vulnerable to Path Traversal allowing server files backup","id":"CVE-2025-66302"},"products":["grav"],"published":"2025-12-01","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":"partial"},"state":"PUBLISHED","updated":"2025-12-03","vendors":["getgrav"]},"summary":"Attackers can crash the Grav admin panel by injecting malicious cron expressions into the scheduled_at parameter, requiring manual server intervention to recover.","url":"https://insights.sbomify.com/CVE-2025-66303/"}