{"api_version":"1","generated_at":"2026-04-23T01:33:36+00:00","cve":"CVE-2023-42452","urls":{"html":"https://cve.report/CVE-2023-42452","api":"https://cve.report/api/cve/CVE-2023-42452.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-42452","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-42452"},"summary":{"title":"CVE-2023-42452","description":"Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse the translation feature to bypass the server-side HTML sanitization, allowing unescaped HTML to execute in the browser. The impact is limited thanks to Mastodon's strict Content Security Policy, blocking inline scripts, etc. However a CSP bypass or loophole could be exploited to execute malicious XSS. Furthermore, it requires user interaction, as this can only occur upon clicking the “Translate” button on a malicious post. Versions 4.0.10, 4.2.8, and 4.2.0-rc2 contain a patch for this issue.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-09-19 16:15:00","updated_at":"2023-09-22 17:12:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2","name":"https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2","refsource":"MISC","tags":[],"title":"Merge pull request from GHSA-2693-xr3m-jhqr · mastodon/mastodon@ff32475 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr","name":"https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr","refsource":"MISC","tags":[],"title":"Stored XSS through the translation feature · Advisory · mastodon/mastodon · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-42452","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42452","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"42452","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"joinmastodon","cpe5":"mastodon","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"42452","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"joinmastodon","cpe5":"mastodon","cpe6":"4.2.0","cpe7":"beta1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"42452","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"joinmastodon","cpe5":"mastodon","cpe6":"4.2.0","cpe7":"beta2","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"42452","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"joinmastodon","cpe5":"mastodon","cpe6":"4.2.0","cpe7":"beta3","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"42452","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"joinmastodon","cpe5":"mastodon","cpe6":"4.2.0","cpe7":"rc1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-42452","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse the translation feature to bypass the server-side HTML sanitization, allowing unescaped HTML to execute in the browser. The impact is limited thanks to Mastodon's strict Content Security Policy, blocking inline scripts, etc. However a CSP bypass or loophole could be exploited to execute malicious XSS. Furthermore, it requires user interaction, as this can only occur upon clicking the “Translate” button on a malicious post. Versions 4.0.10, 4.2.8, and 4.2.0-rc2 contain a patch for this issue."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","cweId":"CWE-79"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"mastodon","product":{"product_data":[{"product_name":"mastodon","version":{"version_data":[{"version_affected":"=","version_value":">= 4.0.0, < 4.0.10"},{"version_affected":"=","version_value":">= 4.1.0, < 4.1.8"},{"version_affected":"=","version_value":">= 4.2.0-beta1, < 4.2.0-rc2"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr","refsource":"MISC","name":"https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr"},{"url":"https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2","refsource":"MISC","name":"https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2"}]},"source":{"advisory":"GHSA-2693-xr3m-jhqr","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}]}},"nvd":{"publishedDate":"2023-09-19 16:15:00","lastModifiedDate":"2023-09-22 17:12:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.3,"impactScore":2.7}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1.0","versionEndExcluding":"4.1.8","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0.0","versionEndExcluding":"4.0.10","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}