{"id":"CVE-2026-116899","kind":"vulnerability","aliases":["CVE-2026-116899"],"related":[],"title":"REDAXO CMS: authenticated editors can alter slices in other categories","description":"REDAXO before 5.21.4 contains a broken access control vulnerability that allows authenticated editors to modify slices in unauthorized categories by pairing a permitted article with a foreign slice id. Attackers can abuse content/edit delete and edit functions or the content_slice_status and content_move_slice APIs to delete, toggle, move, or overwrite other editors' slices.","summary":"REDAXO before 5.21.4 checks article permissions but not the slice ID paired with it, so an editor can pair an article they may edit with a slice from a category they may not. An attacker with an editor account can then delete, toggle, move or overwrite other editors' slices.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cms","php","redaxo","runtime","self-hosted"],"not_affected_if":["auth-required","single-editor"],"how_to_check":"- Check the installed REDAXO version in the project's `redaxo/src/core/boot.php` or the version shown in the backend; versions below `5.21.4` are affected.\n- Confirm whether editor-role accounts exist in the backend under Users.","fix":"- Upgrade REDAXO to `5.21.4` or later.\n- Until upgraded, limit editor-role accounts to trusted staff.","status":"open","published_at":"2026-10-27T11:17:32+00:00","first_seen_at":"2026-10-27T11:31:28+00:00","triaged_at":"2026-10-27T11:31:49+00:00","updated_at":"2026-10-27T11:31:49+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-27T11:31:49Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade REDAXO to `5.21.4` or later.\n- Until upgraded, limit editor-role accounts to trusted staff.","reach":"internet","title":"REDAXO CMS: authenticated editors can alter slices in other categories","impact":"medium","summary":"REDAXO before 5.21.4 checks article permissions but not the slice ID paired with it, so an editor can pair an article they may edit with a slice from a category they may not. An attacker with an editor account can then delete, toggle, move or overwrite other editors' slices.","category":"runtime","nicknames":[],"who_cares":["redaxo","self-hosted","php","cms"],"confidence":0.7,"needs_auth":"yes","worst_case":"Other editors' slices are deleted, toggled, moved or overwritten by a low-privilege editor","analyst_note":"","how_to_check":"- Check the installed REDAXO version in the project's `redaxo/src/core/boot.php` or the version shown in the backend; versions below `5.21.4` are affected.\n- Confirm whether editor-role accounts exist in the backend under Users.","needs_analyst":false,"not_affected_if":["auth-required","single-editor"],"who_is_affected":"Sites running REDAXO before 5.21.4 with more than one editor account that have access to different categories. A single-editor site or one where all editors share full category rights is less exposed, though the flaw still exists. Public visitors without a backend account cannot use it.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000602,"input_tokens":3341,"output_tokens":535,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-116899':13A,16A '-2026':12A,15A '5.21.4':26B,75C 'abus':104C 'access':79C 'account':62B 'allow':83C 'alter':6A 'api':119C 'articl':28B,44B,96C 'attack':58B,102C 'authent':3A,84C 'broken':78C 'categori':10A,53B,91C 'check':27B 'cms':2A,17B 'contain':76C 'content':112C,116C 'content/edit':105C 'control':80C 'cve':11A,14A 'delet':65B,106C,121C 'edit':47B,108C 'editor':4A,40B,61B,71B,85C,127C 'foreign':99C 'function':109C 'host':23B 'id':34B,101C 'may':46B,55B 'modifi':87C 'move':67B,117C,123C 'overwrit':69B,125C 'pair':35B,42B,93C 'permiss':29B 'permit':95C 'php':18B 'redaxo':1A,19B,24B,73C 'runtim':20B 'self':22B 'self-host':21B 'slice':7A,33B,50B,72B,88C,100C,113C,118C,128C 'status':114C 'toggl':66B,122C 'unauthor':90C 'vulner':81C","nicknames":[],"mitigations":[],"who_affected":"Sites running REDAXO before 5.21.4 with more than one editor account that have access to different categories. A single-editor site or one where all editors share full category rights is less exposed, though the flaw still exists. Public visitors without a backend account cannot use it.","tier":"B","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:N/PR:L/UI:N/VC:N/VI:H/VA:N/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-2026-116899","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116899","severity":null,"published_at":"2026-10-27T11:17:32+00:00","modified_at":"2026-10-27T11:17:32+00:00","first_seen_at":"2026-10-27T11:31:28+00:00","fetched_at":"2026-10-27T11:31:28+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"}