{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45551","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-12T17:48:47.880Z","datePublished":"2026-05-29T12:34:22.615Z","dateUpdated":"2026-05-29T13:16:31.397Z"},"containers":{"cna":{"title":"Group-Office: Authenticated Stored XSS in Administrator Context via Arbitrary Cross-User Setting Write","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-9w92-p32g-g99p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-9w92-p32g-g99p"}],"affected":[{"vendor":"Intermesh","product":"groupoffice","versions":[{"version":">= 26.0.1, < 26.0.25","status":"affected"},{"version":">= 25.0.1, < 25.0.1005","status":"affected"},{"version":"< 6.8.165","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-29T12:34:22.615Z"},"descriptions":[{"lang":"en","value":"Group-Office is an enterprise customer relationship management and groupware tool. Prior to 26.0.25, 25.0.100, and 6.8.165, GroupOffice allows authenticated users to persist arbitrary legacy settings for any user_id via index.php?r=core/saveSetting. A separate client-side sink in the email module injects the email_font_size setting directly into JavaScript without escaping. By combining these two issues, any low-privileged authenticated user can overwrite an administrator's email_font_size setting with a JavaScript payload and trigger stored XSS in the administrator's browser when the GroupOffice web client loads views/Extjs3/modulescripts.php. This vulnerability is fixed in 26.0.25, 25.0.100, and 6.8.165."}],"source":{"advisory":"GHSA-9w92-p32g-g99p","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-9w92-p32g-g99p","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-29T13:16:28.023941Z","id":"CVE-2026-45551","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-29T13:16:31.397Z"}}]}}