{"id":"CVE-2026-116885","kind":"vulnerability","aliases":["CVE-2026-116885"],"related":[],"title":"Semantic MediaWiki: reflected XSS in Special:SMWAdmin ID lookup","description":"Semantic MediaWiki from 3.1.0 before 7.3.1 contains a reflected cross-site scripting vulnerability in the Special:SMWAdmin ID lookup that allows unauthenticated attackers to inject markup through the unescaped id parameter. Attackers can lure an smw-admin administrator into opening a crafted lookup link, bypassing the auto-satisfied edit-token check, to execute script and perform privileged actions in the administrator's session.","summary":"Semantic MediaWiki's Special:SMWAdmin ID lookup echoes the unescaped id parameter back into the page, so a crafted link injects script. An attacker who lures a logged-in smw-admin into opening it can run script in that session and perform privileged actions as that administrator.","severity":"medium","cvss":6.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mediawiki","package","self-hosted","semantic-mediawiki"],"not_affected_if":["version-7.3.1-or-later"],"how_to_check":"- Check the installed Semantic MediaWiki version in Special:Version or `composer show mediawiki/semantic-media-wiki` and compare it against the fixed release\n- Confirm whether the wiki has the Special:SMWAdmin page reachable by users in the smw-admin group","fix":"- Upgrade Semantic MediaWiki to `7.3.1` or later\n- Until upgraded, restrict access to Special:SMWAdmin and avoid having administrators click unknown links while logged in","status":"open","published_at":"2026-10-27T11:17:30+00:00","first_seen_at":"2026-10-27T11:31:27+00:00","triaged_at":"2026-10-27T11:32:02+00:00","updated_at":"2026-10-27T11:32:02+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-27T11:32:02Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Semantic MediaWiki to `7.3.1` or later\n- Until upgraded, restrict access to Special:SMWAdmin and avoid having administrators click unknown links while logged in","reach":"internet","title":"Semantic MediaWiki: reflected XSS in Special:SMWAdmin ID lookup","impact":"medium","summary":"Semantic MediaWiki's Special:SMWAdmin ID lookup echoes the unescaped id parameter back into the page, so a crafted link injects script. An attacker who lures a logged-in smw-admin into opening it can run script in that session and perform privileged actions as that administrator.","category":"package","nicknames":[],"who_cares":["mediawiki","semantic-mediawiki","self-hosted"],"confidence":0.8,"needs_auth":"no","worst_case":"script runs in an administrator's session and performs privileged wiki actions","analyst_note":"","how_to_check":"- Check the installed Semantic MediaWiki version in Special:Version or `composer show mediawiki/semantic-media-wiki` and compare it against the fixed release\n- Confirm whether the wiki has the Special:SMWAdmin page reachable by users in the smw-admin group","needs_analyst":false,"not_affected_if":["version-7.3.1-or-later"],"who_is_affected":"Wikis running Semantic MediaWiki from 3.1.0 up to but not including 7.3.1. Exposure depends on administrators with the smw-admin right being lured into opening a crafted link; the attack needs no account on the wiki itself. Sites on versions outside that range can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000637,"input_tokens":3382,"output_tokens":597,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116885':12A,15A '-2026':11A,14A '3.1.0':76C '7.3.1':78C 'action':69B,134C 'admin':56B,111C 'administr':72B,112C,137C 'allow':94C 'attack':47B,96C,105C 'auto':122C 'auto-satisfi':121C 'back':36B 'bypass':119C 'check':127C 'contain':79C 'craft':42B,116C 'cross':83C 'cross-sit':82C 'cve':10A,13A 'echo':31B 'edit':125C 'edit-token':124C 'execut':129C 'host':20B 'id':8A,29B,34B,91C,103C 'inject':44B,98C 'link':43B,118C 'log':52B 'logged-in':51B 'lookup':9A,30B,92C,117C 'lure':49B,107C 'markup':99C 'mediawiki':2A,16B,23B,25B,74C 'open':58B,114C 'packag':17B 'page':39B 'paramet':35B,104C 'perform':67B,132C 'privileg':68B,133C 'reflect':3A,81C 'run':61B 'satisfi':123C 'script':45B,62B,85C,130C 'self':19B 'self-host':18B 'semant':1A,22B,24B,73C 'semantic-mediawiki':21B 'session':65B,139C 'site':84C 'smw':55B,110C 'smw-admin':54B,109C 'smwadmin':7A,28B,90C 'special':6A,27B,89C 'token':126C 'unauthent':95C 'unescap':33B,102C 'vulner':86C 'xss':4A","nicknames":[],"mitigations":[],"who_affected":"Wikis running Semantic MediaWiki from 3.1.0 up to but not including 7.3.1. Exposure depends on administrators with the smw-admin right being lured into opening a crafted link; the attack needs no account on the wiki itself. Sites on versions outside that range can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T11:17:30+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116885","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116885","severity":null,"published_at":"2026-10-27T11:17:30+00:00","modified_at":"2026-10-27T11:17:30+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"}