{"id":"CVE-2026-116893","kind":"vulnerability","aliases":["CVE-2026-116893"],"related":[],"title":"REDAXO: missing authorization lets backend users manage packages and drop tables","description":"REDAXO core before 5.21.5 contains a missing authorization vulnerability in the rex_api_package API function that lets non-admin backend users manage packages with only a valid CSRF token. Attackers holding a token, such as demoted admins with active sessions, can uninstall system addons like structure (dropping their database tables), deactivate, install, or activate packages, and delete non-system packages.","summary":"REDAXO core before 5.21.5 lets non-admin backend users install, activate, deactivate, and uninstall packages through the rex_api_package API using only a valid CSRF token. An attacker can uninstall system addons such as structure, which drops their database tables, and delete non-system packages.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cms","package","php","redaxo","self-hosted"],"not_affected_if":["no-non-admin-backend-users","version-5.21.5-or-later"],"how_to_check":"- Check the installed REDAXO core version in `redaxo/src/core/boot.php` or the backend system page: unknown whether the sources name a specific file.\n- Review which backend users have non-admin roles that still hold active sessions, since the description says demoted admins with live sessions are the main risk.","fix":"- Upgrade REDAXO core to `5.21.5` or later.\n- Until upgraded, restrict backend access to trusted users only.","status":"open","published_at":"2026-10-27T11:17:32+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","triaged_at":"2026-10-27T11:31:58+00:00","updated_at":"2026-10-27T11:31:58+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-27T11:31:58Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade REDAXO core to `5.21.5` or later.\n- Until upgraded, restrict backend access to trusted users only.","reach":"internet","title":"REDAXO: missing authorization lets backend users manage packages and drop tables","impact":"high","summary":"REDAXO core before 5.21.5 lets non-admin backend users install, activate, deactivate, and uninstall packages through the rex_api_package API using only a valid CSRF token. An attacker can uninstall system addons such as structure, which drops their database tables, and delete non-system packages.","category":"package","nicknames":[],"who_cares":["redaxo","php","self-hosted","cms"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker drops database tables by uninstalling system addons","analyst_note":"Confirm the exact affected version range and whether a patch or advisory page exists; the NVD entry lacks a detailed write-up of the check and fix.","how_to_check":"- Check the installed REDAXO core version in `redaxo/src/core/boot.php` or the backend system page: unknown whether the sources name a specific file.\n- Review which backend users have non-admin roles that still hold active sessions, since the description says demoted admins with live sessions are the main risk.","needs_analyst":true,"not_affected_if":["version-5.21.5-or-later","no-non-admin-backend-users"],"who_is_affected":"Sites running REDAXO core before 5.21.5 with backend users who are not administrators. The risk depends on those users holding a valid CSRF token, which an attacker could obtain from a demoted admin session. Sites on 5.21.5 or later, or with no non-admin backend accounts, are not affected.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000645,"input_tokens":3345,"output_tokens":620,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116893':14A,17A '-2026':13A,16A '5.21.5':28B,76C 'activ':36B,113C,128C 'addon':58B,118C 'admin':32B,93C,111C 'api':44B,46B,85C,87C 'attack':54B,104C 'author':3A,80C 'backend':5A,33B,94C 'cms':18B 'contain':77C 'core':26B,74C 'csrf':51B,102C 'cve':12A,15A 'databas':65B,123C 'deactiv':37B,125C 'delet':68B,131C 'demot':110C 'drop':10A,63B,121C 'function':88C 'hold':105C 'host':24B 'instal':35B,126C 'let':4A,29B,90C 'like':119C 'manag':7A,96C 'miss':2A,79C 'non':31B,70B,92C,133C 'non-admin':30B,91C 'non-system':69B,132C 'packag':8A,19B,40B,45B,72B,86C,97C,129C,135C 'php':20B 'redaxo':1A,21B,25B,73C 'rex':43B,84C 'self':23B 'self-host':22B 'session':114C 'structur':61B,120C 'system':57B,71B,117C,134C 'tabl':11A,66B,124C 'token':52B,103C,107C 'uninstal':39B,56B,116C 'use':47B 'user':6A,34B,95C 'valid':50B,101C 'vulner':81C","nicknames":[],"mitigations":[],"who_affected":"Sites running REDAXO core before 5.21.5 with backend users who are not administrators. The risk depends on those users holding a valid CSRF token, which an attacker could obtain from a demoted admin session. Sites on 5.21.5 or later, or with no non-admin backend accounts, are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T11:17:32+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116893","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116893","severity":null,"published_at":"2026-10-27T11:17:32+00:00","modified_at":"2026-10-27T11:17:32+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","fetched_at":"2026-10-27T11:31:27+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"}