{"schema":"threatline.record/2","record":{"id":"CVE-2026-63205","aliases":["GHSA-pp8r-x7pp-5qj5"],"summary":"Zammad: Channel admins can read unauthorized attachments via signature rich-text body","details":"Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when creating or updating an email signature, Zammad processes inline images referenced in the signature body. If a signature body contains an HTML img tag pointing to any existing attachment, the system copies that attachment into a new signature-owned record, without checking whether the user has permission to access the original attachment. The newly created copy is then downloadable by the same channel-admin user, because attachment access is determined by the copy's owner (the signature), not the original object (e.g., a ticket or knowledge-base article). This allows a user with any of the admin.channel_email, admin.channel_google, admin.channel_microsoft365, or admin.channel_microsoft_graph permissions to read attachments they would otherwise be denied access to, such as ticket attachments belonging to groups they are not a member of. This issue is fixed in version 7.1.2.","categories":["Applications & CMS"],"product":"zammad","vendor":"zammad","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-63205","source_modified_at":"2026-09-29T19:40:34.778Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zammad","vendor":"zammad","versions":[{"version":"< 7.1.2","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00321,"percentile":0.2389,"score_date":"2026-10-23"},"published_at":"2026-09-25T18:13:25.176Z","modified_at":"2026-09-29T19:40:34.778Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-63205","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-29T19:40:34.778Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-63205","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/zammad/zammad/security/advisories/GHSA-pp8r-x7pp-5qj5","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/zammad/zammad/commit/f3e4da83621efad8443a4e9fe6bd87befad47c44","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-29T19:40:24.888341Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-29T19:40:34.778Z","content_hash":"04526fcd132f28f636d7643cea39cc6ccdbea6d2c1c0d80c0ab75bc581054089"}}