{"id":"CVE-2026-53963","state":"PUBLISHED","title":"Discourse: Stored-XSS in 2FA delete confirmation modal","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a malicious second factor name on an attacker-controlled account was not escaped in the delete confirmation dialog, allowing stored cross-site scripting when an administrator impersonated that account. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","publishedAt":"2026-07-09T22:05:46.329Z","updatedAt":"2026-07-14T01:19:05.114Z","severity":{"score":7.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["discourse discourse"],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.1.0-latest, < 2026.1.5","status":"affected"},{"version":">= 2026.4.0-latest, < 2026.4.2","status":"affected"},{"version":">= 2026.5.0-latest, < 2026.5.1","status":"affected"}]}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5","https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed","https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8","https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b","https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915","https://github.com/discourse/discourse/releases/tag/v2026.1.5","https://github.com/discourse/discourse/releases/tag/v2026.4.2","https://github.com/discourse/discourse/releases/tag/v2026.5.1","https://github.com/discourse/discourse/releases/tag/v2026.6.0"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53963.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53963","state":"PUBLISHED","datePublished":"2026-07-09T22:05:46.329Z","dateUpdated":"2026-07-14T01:19:05.114Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-11T15:50:01.282Z"},"containers":{"cna":{"title":"Discourse: Stored-XSS in 2FA delete confirmation modal","descriptions":[{"lang":"en","value":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a malicious second factor name on an attacker-controlled account was not escaped in the delete confirmation dialog, allowing stored cross-site scripting when an administrator impersonated that account. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."}],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.1.0-latest, < 2026.1.5","status":"affected"},{"version":">= 2026.4.0-latest, < 2026.4.2","status":"affected"},{"version":">= 2026.5.0-latest, < 2026.5.1","status":"affected"}]}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5","name":"https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed","name":"https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8","name":"https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b","name":"https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915","name":"https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","name":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","name":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","name":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","name":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-09T22:05:46.329Z"},"source":{"advisory":"GHSA-wg5x-7f23-m3r5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-14T01:17:07.991865Z","id":"CVE-2026-53963","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-14T01:19:05.114Z"}}]}}}