{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"7.7.1","status":"affected","version":"6.3.0","versionType":"semver"},{"lessThanOrEqual":"7.1.5","status":"affected","version":"6.3.0","versionType":"semver"},{"lessThanOrEqual":"7.8.0","status":"affected","version":"6.3.0","versionType":"semver"},{"status":"unaffected","version":"7.8.1"},{"status":"unaffected","version":"7.7.2"},{"status":"unaffected","version":"7.1.6"}]}],"source":"responsibledisclosure@mattermost.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","matchCriteriaId":"68480D55-9BBC-46E3-8DE9-A2F13F2F8853","versionEndExcluding":"7.1.6","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:7.7.1:*:*:*:*:*:*:*","matchCriteriaId":"BB8E1831-9267-467F-A646-84052F0A3FAE","vulnerable":true},{"criteria":"cpe:2.3:a:mattermost:mattermost_server:7.8.0:*:*:*:*:*:*:*","matchCriteriaId":"F76672DF-2ABD-4C95-A7CB-65AC3AA3F2C9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.\n\n"}],"id":"CVE-2023-1777","lastModified":"2026-06-17T05:28:44.143","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"exploitabilityScore":2.8,"impactScore":3.6,"source":"responsibledisclosure@mattermost.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"exploitabilityScore":3.9,"impactScore":1.4,"source":"nvd@nist.gov","type":"Primary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2023-1777","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2024-12-06T22:51:57.392822Z","version":"2.0.3"}}]},"published":"2023-03-31T12:15:06.803","references":[{"source":"responsibledisclosure@mattermost.com","tags":["Vendor Advisory"],"url":"https://mattermost.com/security-updates/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://mattermost.com/security-updates/"}],"sourceIdentifier":"responsibledisclosure@mattermost.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-200"}],"source":"responsibledisclosure@mattermost.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-668"}],"source":"nvd@nist.gov","type":"Primary"}]}