{"id":"CVE-2026-120332","kind":"vulnerability","aliases":["CVE-2026-120332"],"related":[],"title":"TYPO3 mail module: unescaped HTML lets backend users run scripts","description":"The HTML content of mails and tracked URLs are rendered unescaped in the backend module. Backend users with access to the mail module can inject arbitrary HTML and JavaScript, which is executed in the context of other backend users viewing the mail preview or report.","summary":"Backend users with access to the mail module can inject HTML and JavaScript into mail content and tracked URLs. The script then runs in the browser of other backend users who view the mail preview or report.","severity":"medium","cvss":5.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["backend","cms","other","typo3"],"not_affected_if":["frontend-only","no-mail-module-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-03T10:17:18+00:00","first_seen_at":"2026-11-03T10:20:16+00:00","triaged_at":"2026-11-03T10:20:43+00:00","updated_at":"2026-11-03T10:20:43+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-03T10:20:43Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"TYPO3 mail module: unescaped HTML lets backend users run scripts","impact":"medium","summary":"Backend users with access to the mail module can inject HTML and JavaScript into mail content and tracked URLs. The script then runs in the browser of other backend users who view the mail preview or report.","audience":"businesses","category":"other","nicknames":[],"who_cares":["typo3","cms","backend"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"script runs in other backend users' browsers, hijacking their sessions","analyst_note":"Identify the affected product and version ranges and any fixed release from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-120332.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":["no-mail-module-users","frontend-only"],"who_is_affected":"Sites running the affected backend mail module where backend users can edit or view mail content and tracked URLs. Only backend users with mail module access can inject the content, so sites without such users are at lower risk. The sources do not name the affected product or versions.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000635,"input_tokens":4097,"output_tokens":451,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-120332':13A,16A '-2026':12A,15A 'access':24B,76C 'arbitrari':83C 'backend':7A,17B,21B,49B,71C,73C,95C 'browser':46B 'cms':18B 'content':36B,60C 'context':92C 'cve':11A,14A 'execut':89C 'html':5A,31B,59C,84C 'inject':30B,82C 'javascript':33B,86C 'let':6A 'mail':2A,27B,35B,54B,62C,79C,99C 'modul':3A,28B,72C,80C 'preview':55B,100C 'render':67C 'report':57B,102C 'run':9A,43B 'script':10A,41B 'track':38B,64C 'typo3':1A,20B 'unescap':4A,68C 'url':39B,65C 'user':8A,22B,50B,74C,96C 'view':52B,97C","nicknames":[],"mitigations":[],"who_affected":"Sites running the affected backend mail module where backend users can edit or view mail content and tracked URLs. Only backend users with mail module access can inject the content, so sites without such users are at lower risk. The sources do not name the affected product or versions.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["backend","cms","medium","other","typo3"],"first_public_at":"2026-11-03T10:17:18+00:00","kev":null,"cvss_vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"f4fb688c-4412-4426-b4b8-421ecf27b14a","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-120332","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120332","severity":null,"published_at":"2026-11-03T10:17:18+00:00","modified_at":"2026-11-03T10:17:18+00:00","first_seen_at":"2026-11-03T10:20:16+00:00","fetched_at":"2026-11-03T10:20:16+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}