{"answers":{"affected":"3 open source packages ship an affected version, including matrix-synapse. It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-12291 in the wild and no public exploit code.","fix":"Upgrade matrix-synapse to 0.31.1 or later.","what":"CVE-2018-12291 is a high-severity vulnerability in n/a, published on 13 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-12291 and fix it if it is affected.\n\nWhat it is: CVE-2018-12291 is a high-severity vulnerability in n/a, published on 13 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2018-12291 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- matrix-synapse (PyPI): affected all versions; fixed in 0.31.1\n- matrix-synapse (PyPI): affected all versions; fixed in 0.31.1\n- matrix-synapse (PyPI): affected all versions; fixed in 0.31.1\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-2018-12291/ (Markdown: https://insights.sbomify.com/CVE-2018-12291/index.md)","id":"CVE-2018-12291","markdown":"https://insights.sbomify.com/CVE-2018-12291/index.md","name":"CVE-2018-12291","record":{"aliases":["GHSA-v8wm-g9f2-xjv4","PYSEC-2026-664","UBUNTU-CVE-2018-12291"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Matrix Synapse server","requires_auth":"none","summary":"Attackers can view unauthorized events via the federation API due to incorrect visibility rule enforcement in Matrix Synapse.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"synapse","vendor":"matrix"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[],"description":"The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Matrix Synapse Security Filtering Flaw","id":"CVE-2018-12291","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"information_disclosure","year":"2018"},"n_packages":3,"n_references":2,"next":{"headline":"Use after free in n/a","id":"CVE-2018-12292"},"packages":[{"ecosystem":"PyPI","fixed":["0.31.1"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":null,"source":"GHSA-v8wm-g9f2-xjv4"},{"ecosystem":"PyPI","fixed":["0.31.1"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","source":"GHSA-v8wm-g9f2-xjv4"},{"ecosystem":"PyPI","fixed":["0.31.1"],"introduced":["0"],"last_affected":[],"package":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","source":"PYSEC-2026-664"}],"prev":{"headline":"Yii2-StateMachine extension for Yii2 XSS Vulnerability","id":"CVE-2018-12290"},"products":["n/a"],"published":"2018-06-13","related":[{"cvss_score":9.8,"headline":"Improper Verification of Cryptographic Signature in matrix-synapse","id":"CVE-2019-18835","kev_date_added":null,"published":"2019-11-07"},{"cvss_score":8.7,"headline":"Synapse allows a a malformed invite to break the invitee's `/sync`","id":"CVE-2024-52815","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":8.2,"headline":"Synapse allows unsupported content types to lead to memory exhaustion","id":"CVE-2024-52805","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":8.2,"headline":"Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders","id":"CVE-2024-53863","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":7.5,"headline":"Synapse denial of service through media disk space consumption","id":"CVE-2024-37302","kev_date_added":null,"published":"2024-12-03"},{"cvss_score":7.5,"headline":"Matrix Synapse Authorization Error","id":"CVE-2018-12423","kev_date_added":null,"published":"2018-06-14"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-17","vendors":["n/a"]},"summary":"Attackers can view unauthorized events via the federation API due to incorrect visibility rule enforcement in Matrix Synapse.","url":"https://insights.sbomify.com/CVE-2018-12291/"}