{"id":"CVE-2026-116895","kind":"vulnerability","aliases":["CVE-2026-116895"],"related":[],"title":"REDAXO: backend accepts forged safemode link, disabling safe mode via CSRF","description":"REDAXO before 5.21.5 contains a cross-site request forgery vulnerability because the backend processes the safemode GET parameter in index.php without validating a CSRF token. Attackers can lure a logged-in administrator into opening a crafted link to disable global safe mode, writing safe_mode: false to config.yml, or enable session safe mode, disabling backend addons.","summary":"REDAXO's backend reads a safemode GET parameter in index.php without checking a CSRF token. A crafted link can make a logged-in administrator turn off global safe mode or disable backend addons.","severity":"medium","cvss":5.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","php","redaxo","self-hosted"],"not_affected_if":["no-backend-admin-logins","version-5.21.5-or-later"],"how_to_check":"- Check the installed REDAXO version in the backend or `redaxo/src/core/version.php`; affected versions are before `5.21.5`.\n- Look for `safe_mode: false` in `redaxo/src/core/config.yml` if the instance has been reachable by a logged-in admin following external links.","fix":"- Upgrade REDAXO to `5.21.5` or later.\n- Until upgraded, avoid following untrusted links while logged into the backend.","status":"open","published_at":"2026-10-27T11:17:32+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","triaged_at":"2026-10-27T11:32:10+00:00","updated_at":"2026-10-27T11:32:10+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-27T11:32:10Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade REDAXO to `5.21.5` or later.\n- Until upgraded, avoid following untrusted links while logged into the backend.","reach":"internet","title":"REDAXO: backend accepts forged safemode link, disabling safe mode via CSRF","impact":"medium","summary":"REDAXO's backend reads a safemode GET parameter in index.php without checking a CSRF token. A crafted link can make a logged-in administrator turn off global safe mode or disable backend addons.","category":"package","nicknames":[],"who_cares":["redaxo","php","self-hosted"],"confidence":0.8,"needs_auth":"yes","worst_case":"Backend addons disabled or global safe mode turned off by a forged request.","analyst_note":"","how_to_check":"- Check the installed REDAXO version in the backend or `redaxo/src/core/version.php`; affected versions are before `5.21.5`.\n- Look for `safe_mode: false` in `redaxo/src/core/config.yml` if the instance has been reachable by a logged-in admin following external links.","needs_analyst":false,"not_affected_if":["version-5.21.5-or-later","no-backend-admin-logins"],"who_is_affected":"Any REDAXO installation before 5.21.5 with a backend that administrators log into. The attack needs a logged-in administrator to open a crafted link, so instances without active admin sessions face less risk.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000595,"input_tokens":3342,"output_tokens":522,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116895':14A,17A '-2026':13A,16A '5.21.5':60C 'accept':3A 'addon':57B,115C 'administr':48B,91C 'attack':84C 'backend':2A,26B,56B,71C,114C 'check':35B 'config.yml':107C 'contain':61C 'craft':40B,95C 'cross':64C 'cross-sit':63C 'csrf':11A,37B,82C 'cve':12A,15A 'disabl':7A,55B,98C,113C 'enabl':109C 'fals':105C 'forg':4A 'forgeri':67C 'get':30B,75C 'global':51B,99C 'host':23B 'index.php':33B,78C 'link':6A,41B,96C 'log':46B,89C 'logged-in':45B,88C 'lure':86C 'make':43B 'mode':9A,53B,101C,104C,112C 'open':93C 'packag':18B 'paramet':31B,76C 'php':19B 'process':72C 'read':27B 'redaxo':1A,20B,24B,58C 'request':66C 'safe':8A,52B,100C,103C,111C 'safemod':5A,29B,74C 'self':22B 'self-host':21B 'session':110C 'site':65C 'token':38B,83C 'turn':49B 'valid':80C 'via':10A 'vulner':68C 'without':34B,79C 'write':102C","nicknames":[],"mitigations":[],"who_affected":"Any REDAXO installation before 5.21.5 with a backend that administrators log into. The attack needs a logged-in administrator to open a crafted link, so instances without active admin sessions face less risk.","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:N/PR:N/UI:A/VC:N/VI:L/VA:L/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-2026-116895","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116895","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"}