{"id":"CVE-2024-29977","summary":"Malicious remote can create arbitrary reactions on arbitrary posts","details":"Mattermost versions 9.9.x \u003c= 9.9.0, 9.5.x \u003c= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts","aliases":["GHSA-jq3g-xqpx-37x3","GO-2024-3030"],"modified":"2026-08-12T03:51:20.152991237Z","published":"2024-08-01T14:05:00.340Z","database_specific":{"cna_assigner":"Mattermost","cwe_ids":["CWE-284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/29xxx/CVE-2024-29977.json","unresolved_ranges":[{"extracted_events":[{"introduced":"9.9.0"},{"last_affected":"9.9.0"},{"introduced":"9.5.0"},{"last_affected":"9.5.6"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/29xxx/CVE-2024-29977.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-29977"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"99d819d25d0b16b3faed901b1fe5c41de7655e9c"},{"fixed":"55b24d27c857936c742992b6e3ca94bb2c5c3dac"},{"introduced":"4179e17b491ec5292ca6e157d7b216b464bce397"},{"last_affected":"4179e17b491ec5292ca6e157d7b216b464bce397"}],"database_specific":{"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost:9.9.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"9.5.0"},{"fixed":"9.5.7"},{"introduced":"9.9.0"},{"last_affected":"9.9.0"}]}}],"versions":["9.9.0","v9.5.7-rc2","v9.5.7-rc1","v9.5.6","v9.9.0-rc4","v9.9.0","@mattermost/types@9.9.0","@mattermost/client@9.9.0","v9.5.6-rc2","v9.5.6-rc1","v9.5.5-rc1","v9.5.5","v9.5.4-rc2","v9.5.4","v9.5.4-rc1","v9.5.3","v9.5.3-rc3","v9.5.3-rc2","v9.5.3-rc1","v9.5.2","v9.5.1-rc1","v9.5.1","v9.5.0-rc3","v9.5.0","@mattermost/types@9.5.0","@mattermost/client@9.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-29977.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"}]}