{"id":"CVE-2023-2793","summary":"Stack exhaustion in PreparePostForClientWithEmbedsAndImages","details":"Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message.\n\n","modified":"2026-08-12T03:51:28.202978515Z","published":"2023-06-16T09:02:34.751Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2793.json","unresolved_ranges":[{"extracted_events":[{"last_affected":"7.8.2"},{"last_affected":"7.9.1"},{"introduced":"7.10.0"},{"last_affected":"7.10.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"Mattermost","cwe_ids":["CWE-400"]},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2793.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-2793"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"f14c24391ca84740d90a29ec8b67579326eaa236"},{"last_affected":"bfaf0fd3d8434d403c61556eb2dd1be0d9965071"},{"introduced":"c4d8c1450ab2b9538bbc2690ca1ee865567a5888"},{"last_affected":"2a75f997ee6cbff3047b7215073d1659ea1f98c0"},{"introduced":"5b33575d571469115f29720530ff5b53a6cb7de5"},{"last_affected":"5b33575d571469115f29720530ff5b53a6cb7de5"}],"database_specific":{"extracted_events":[{"introduced":"7.8.0"},{"last_affected":"7.8.3"},{"introduced":"7.9.0"},{"last_affected":"7.9.2"},{"introduced":"7.10.0"},{"last_affected":"7.10.0"}],"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost:7.10.0:*:*:*:*:*:*:*"]}}],"versions":["7.10.0","v7.10.0","v7.9.2","v7.8.3","v7.9.1","v7.8.2","v7.9.0","v7.8.1","v7.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-2793.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}