{"answers":{"affected":"4 open source packages ship an affected version, including pocketmine/pocketmine-mp.","exploited":"There is no known exploitation of CVE-2023-54393 in the wild and no public exploit code.","fix":"Upgrade pocketmine/pocketmine-mp to a fixed version for your release line: 4.20.5 or 4.21.1.","what":"CVE-2023-54393 is a high-severity vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026."},"fix_prompt":"Check this codebase for CVE-2023-54393 and fix it if it is affected.\n\nWhat it is: CVE-2023-54393 is a high-severity vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. \nExploitation: There is no known exploitation of CVE-2023-54393 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pocketmine/pocketmine-mp (Packagist): affected all versions; fixed in 4.20.5\n- pocketmine/pocketmine-mp (Packagist): affected all versions; fixed in 4.20.5\n- pocketmine/pocketmine-mp (Packagist): affected from 4.21.0; fixed in 4.21.1\n- pocketmine/pocketmine-mp (Packagist): affected from 4.21.0; fixed in 4.21.1\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-2023-54393/ (Markdown: https://insights.sbomify.com/CVE-2023-54393/index.md)","id":"CVE-2023-54393","markdown":"https://insights.sbomify.com/CVE-2023-54393/index.md","name":"CVE-2023-54393","record":{"aliases":["GHSA-ghgx-426v-hj74","GHSA-pqp3-8rrw-g8vm"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"PocketMine-MP versions before 4.20.5 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper validation in the JsonMapper dependency. Attackers can send malformed JSON structures in LoginPacket to crash the server.","ecosystems":["Packagist"],"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":"PocketMine-MP before 4.20.5 Denial of Service via LoginPacket","id":"CVE-2023-54393","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":null,"year":"2023"},"n_packages":4,"n_references":4,"next":{"headline":"PocketMine-MP before 4.18.0-ALPHA2 Bandwidth Amplification via InventoryTransactionPacket","id":"CVE-2023-54394"},"packages":[{"ecosystem":"Packagist","fixed":["4.20.5"],"introduced":["0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":null,"source":"GHSA-pqp3-8rrw-g8vm"},{"ecosystem":"Packagist","fixed":["4.20.5"],"introduced":["0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":"pkg:composer/pocketmine/pocketmine-mp","source":"GHSA-pqp3-8rrw-g8vm"},{"ecosystem":"Packagist","fixed":["4.21.1"],"introduced":["4.21.0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":null,"source":"GHSA-pqp3-8rrw-g8vm"},{"ecosystem":"Packagist","fixed":["4.21.1"],"introduced":["4.21.0"],"last_affected":[],"package":"pocketmine/pocketmine-mp","purl":"pkg:composer/pocketmine/pocketmine-mp","source":"GHSA-pqp3-8rrw-g8vm"}],"prev":{"headline":"PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket","id":"CVE-2023-54392"},"products":["PocketMine-MP"],"published":"2026-09-09","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["pmmp"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2023-54393/"}